Troubleshooting Guide

Home | Troubleshooting Guide

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When something goes wrong, start here. This guide is organized by what you see (the symptom), not by system. Find your problem, read the cause, apply the fix.

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Inhaltsverzeichnis

1. Mod Won't Load
2. Script Errors
3. RPC and Network Issues
4. UI Problems
5. Build and PBO Issues
6. Performance Issues
7. Item, Vehicle, and Entity Issues
8. Config and Types Issues
9. Persistence Issues
10. Decision Flowcharts
11. Debug Commands Quick Reference
12. Log File Locations
13. Where to Get Help

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1. Mod Won't Load

These are problems where the mod macht nicht appear, macht nicht activate, or is rejected by das Spiel beim Start.

Symptom	Cause	Fix
"Addon requires addon X" error beim Start	Missing or incorrect requiredAddons[] entry	Add the exact CfgPatches class name of the dependency to your requiredAddons[]. Names are case-sensitive. See Chapter 2.2.
Mod not visible in launcher	mod.cpp file is missing or has syntax errors	Create or fix mod.cpp in your mod root. It must contain name, author, and dir fields. See Chapter 2.3.
"Config parse error" beim Start	Syntax error in config.cpp	Check for missing semicolons after class closings (};), unclosed braces, or unbalanced quotes. Every class body ends with };, every property ends with ;.
No script log entries at all	CfgMods defs block points to wrong path	Verify that your config.cpp CfgMods entry has the correct dir and that the script defs file matches your folder structure. Die Engine silently ignores wrong paths.
Mod loads but nothing happens	Scripts compile but never execute	Check that your mod has an entry point: a modded class MissionServer or MissionGameplay, a registered module, or a plugin. Scripts mache nicht run by themselves. See Chapter 7.2.
"Cannot register cfg class X"	Duplicate CfgPatches class name	Another mod already uses that class name. Rename your CfgPatches class to something unique with your mod prefix.
Mod loads only in singleplayer	Server macht nicht have the mod installed	Ensure the server's -mod= launch parameter includes your mod path, and the PBO is in the server's @YourMod/Addons/ folder.
"Addon X ist nicht signed"	Server requires signed addons	Sign your PBOs with your private key and provide the .bikey to the server's keys/ folder. See Chapter 4.6.

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2. Script Errors

These appear in the script log as SCRIPT (E): or SCRIPT ERROR: lines.

Symptom	Cause	Fix
Null pointer access	Accessing a variable that is null	Add a null check before using the variable: if (myVar) { myVar.DoSomething(); }. This is am häufigsten runtime error.
Cannot convert type 'X' to type 'Y'	Direct cast between incompatible types	Use Class.CastTo() for safe downcasting: Class.CastTo(result, source);. Never assume a cast will succeed. See Chapter 1.9.
Undefined variable 'X'	Typo, wrong scope, or wrong layer	Check spelling first. If die Variable is a class from another file, ensure it is defined in the same or lower layer. 3_Game cannot see 4_World types. See Chapter 2.1.
Method 'X' not found	Calling a method that macht nicht exist on that class	Verify die Methode name and check der Elternteil class. You may need to cast to a more specific type first. Check vanilla scripts at P:\DZ\scripts\ for the correct API.
Division by zero	Dividing by a variable that equals 0	Add a guard: if (divisor != 0) result = value / divisor;. This also applies to modulo (%) operations.
Redeclaration of variable 'X'	Same variable name declared in sibling else if blocks	Declare die Variable once before the if/else chain, then assign inside each branch. See Chapter 1.12.
Member already defined	Duplicate variable or method name in a class	Check for copy/paste errors. Each member name muss unique within a class hierarchy (including parent classes).
Cannot create instance of type 'X'	Trying to new an abstract class or an interface	Check that die Klasse ist nicht abstract (no proto methods without bodies). Instantiate a concrete subclass stattdessen.
Stack overflow	Infinite recursion	A method calls itself without a base case, or a modded class override macht nicht properly guard against re-entry. Add a depth check or fix the recursive call.
Index out of range	Array access with invalid index	Always check array.Count() or use array.IsValidIndex(idx) before accessing by index.
String conversion error	Using string.ToInt() or string.ToFloat() on non-numeric text	Validate string content before conversion. There is no try/catch, so you must guard manually.
Error: Serializer X mismatch	Read/write order macht nicht match in serialization	Ensure OnStoreSave() and OnStoreLoad() write and read the same types in the same order, including version checks.
Syntax error with no clear message	Backslash \ or escaped quote \" in string literal	Enforce Script's CParser macht nicht support \\ or \". Use forward slashes for paths ("my/path/file"). For quotes, use single-quote characters. See Chapter 1.12.
JsonFileLoader returns null data	Assigning der Rückgabewert of JsonLoadFile()	JsonLoadFile() returns void. Pre-allocate das Objekt and pass it by reference: ref MyConfig cfg = new MyConfig(); JsonFileLoader<MyConfig>.JsonLoadFile(path, cfg);. See Chapter 6.8.
Object.IsAlive() macht nicht exist	Calling IsAlive() on base Object	IsAlive() is only on EntityAI. Cast first: EntityAI entity; if (Class.CastTo(entity, obj) && entity.IsAlive()) { ... }
No ternary operator support	Using condition ? a : b syntax	Enforce Script has no ternary operator. Use an if/else block stattdessen. See Chapter 1.12.
do...while loop error	Using do { } while(cond)	Enforce Script macht nicht support do...while. Use a while loop with a break condition stattdessen. See Chapter 1.12.
Multiline method call fails	Splitting a single method call across lines incorrectly	Avoid splitting chained calls with comments or preprocessor directives between lines. Keep method call chains on one line or use intermediate variables.

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3. RPC and Network Issues

Problems with Remote Procedure Calls and client-server communication.

Symptom	Cause	Fix
RPC sent but never received	Registration mismatch	Both sender and receiver must register the same RPC ID. Verify the ID matches exactly on both client and server. See Chapter 6.9.
RPC received but data is corrupted	Read/write parameter mismatch	The sender's Write() calls and receiver's Read() calls must have the same types in the same order. A single mismatch corrupts all subsequent reads.
RPC crashes der Server	Null entity target or wrong parameter types	Ensure das Ziel entity exists auf beiden Seiten. Never send null as the RPC target. Validate all read parameters before use.
Data not syncing to clients	Missing SetSynchDirty()	After changing any variable registered for synchronization, call SetSynchDirty() on the entity. Without it, die Engine macht nicht broadcast changes.
Works in singleplayer / listen server, fails on dedicated	Different code paths for listen vs. dedicated	On a listen server, both client and server run in the same process, hiding timing and null issues. Always test on a dedicated server. Check GetGame().IsServer() and GetGame().IsMultiplayer() guards.
RPC floods and server lag	Sending RPCs every frame or in tight loops	Throttle RPC calls with timers or accumulators. Batch multiple small updates into a single RPC. Use Net Sync Variables for data that changes frequently.
Client receives RPC meant for all clients	Using RPCSingleParam with wrong target	Use null as the identity parameter to broadcast, or provide a specific PlayerIdentity to send to one client.
OnRPC() never called	Override is in the wrong class or layer	OnRPC() muss overridden on die Entität that receives the RPC. If overriding on PlayerBase, ensure you call super.OnRPC() so other mods still work.
Net Sync Variables not updating on client	Missing RegisterNetSyncVariable*() or wrong type	Register each variable in der Konstruktor with the correct method (RegisterNetSyncVariableInt, RegisterNetSyncVariableFloat, RegisterNetSyncVariableBool). Override OnVariablesSynchronized() to react to changes auf dem Client side.
RPC works for host but not other players	Using player object reference stattdessen of identity	On dedicated servers, the host player ist nicht special. Ensure you are using PlayerIdentity for targeting and not relying on local player references that only exist on the sender's machine.

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4. UI Problems

Issues with GUI layouts, widgets, menus, and input.

Symptom	Cause	Fix
Layout loads but nothing is visible	Widget size is zero	Check hexactsize and vexactsize values. Both muss greater than zero. Do not use negative sizes. See Chapter 3.3.
CreateWidgets() returns null	Layout file path is wrong or file is missing	Verify the .layout file path is correct (forward slashes, no typos). Die Engine returns null silently on bad paths, no error is logged.
Widgets exist but kann nicht clicked	Another widget is covering the button	Check widget priority (z-order). Higher priority widgets render on top and capture input first. Also check that the button has ButtonWidget as its ScriptClass or is a ButtonWidget type.
Game input is stuck / cannot move after closing UI	ChangeGameFocus() calls are imbalanced	Every GetGame().GetInput().ChangeGameFocus(1) muss paired with ChangeGameFocus(-1). Track your focus changes and ensure cleanup happens even if the UI is force-closed.
Text shows #STR_some_key literally	Stringtable entry is missing or file ist nicht loaded	Add the key to your stringtable.csv. Check that the CSV is in your mod root and has the correct Language,Key,Original header format. See Chapter 5.2.
Mouse cursor macht nicht appear	ShowUICursor() not called	Call GetGame().GetUIManager().ShowUICursor(true) when opening your UI. Call it with false when closing.
UI flickers or renders behind game world	Layout ist nicht attached to correct parent widget	Attach your layout to a proper parent. For fullscreen overlays, use GetGame().GetWorkspace() as the parent.
ScrollWidget content macht nicht scroll	Content ist nicht inside a WrapSpacer or child widget	ScrollWidget needs a single child (usually a WrapSpacer or FrameWidget) that is larger than the scroll area. Put your content widgets inside that child. See Chapter 3.3.
Image or icon not showing	Path uses backslashes or wrong extension	Use forward slashes in image paths. Verify the file exists and is in a recognized format (.paa, .edds). Use ImageWidget for images, not TextWidget.
Slider macht nicht respond to input	Missing script handler or wrong widget type	Ensure the slider widget has a ScriptClass assigned and that your handler processes OnChange events. Initialize the slider range in script.
UI looks different at other resolutions	Using hardcoded pixel values	Use proportional sizing (halign, valign, hfill, vfill) stattdessen of fixed pixel values. Test at multiple resolutions. See Chapter 3.3.

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5. Build and PBO Issues

Problems with packing, binarizing, and deploying mods.

Symptom	Cause	Fix
"Include file not found" during binarize	Config references a file that macht nicht exist	Check that all #include paths in model configs and rvmats are correct. Ensure the P: drive is mounted and source files are accessible.
PBO builds successfully but mod crashes on load	config.cpp binarization error	Try building with binarization disabled to isolate the issue. If it works unbinarized, das Problem is in a config that the binarizer rejects silently.
"Signature check failed" on server connect	PBO is unsigned or signed with wrong key	Re-sign the PBO with your private key using DSSignFile. Ensure der Server has the matching .bikey in its keys/ folder.
File patching changes not taking effect	Not using the diagnostic executable	File patching only works with DayZDiag_x64.exe, not the retail DayZ_x64.exe. Launch with -filePatching parameter.
"Prefix mismatch" warning	PBO prefix macht nicht match config.cpp	Ensure the $PBOPREFIX$ file content matches the addon prefix defined in your config.cpp CfgPatches.
Addon Builder fails silently	Path contains special characters or spaces	Move your project to a path without spaces or special characters. Use short folder names.
Binarized model looks wrong in-game	LOD or geometry issues in P3D	Check model LODs in Object Builder. Ensure the Fire Geometry and View Geometry LODs are correct. Rebuild the model.
Old version of mod loads despite changes	Cached PBO or workshop version overriding	Delete the old PBO. Check that das Spiel ist nicht loading a cached workshop version. Verify the -mod= path points to your development folder, not the workshop folder.
Addon Builder reports "no entry" warnings	Config references a property that macht nicht exist	These warnings are usually non-fatal. Check that all CfgVehicles base classes exist. Missing entries in inherited configs cause cascading warnings.
PBO packing includes unwanted files	No .pboignore or filter set	Addon Builder packs everything in the source folder. Use a .pboignore file or explicitly exclude file types (.psd, .blend, .bak) in the builder settings.

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6. Performance Issues

Server or client FPS drops, memory problems, and slow operations.

Symptom	Cause	Fix
Low server FPS (below 20)	Heavy processing in OnUpdate() or per-frame methods	Use a delta-time accumulator to throttle work: only execute logic every N seconds. Move expensive operations to timers or scheduled callbacks. See Chapter 7.7.
Memory grows over time (memory leak)	ref reference cycles preventing garbage collection	When two objects hold ref references to each other, neither is ever freed. Make one side a raw (non-ref) reference. Break cycles in cleanup methods. See Chapter 1.8.
Slow server startup	Heavy initialization in OnInit	Defer non-critical initialization with GetGame().GetCallQueue(CALL_CATEGORY_SYSTEM).CallLater(). Load configs lazily on first use stattdessen of all beim Start.
Client FPS drops near specific objects	Complex model with too many polygons or bad LODs	Add proper LOD levels to your model. Die Engine uses LODs to reduce poly count at distance. Ensure LOD transitions are smooth.
Stutter every few seconds	Periodic garbage collection spikes	Reduce object churn. Reuse objects via pooling stattdessen of constantly creating and destroying them. Pre-allocate arrays.
Network lag spikes	Too many RPCs or large RPC payloads	Batch small updates into fewer RPCs. Use Net Sync Variables for frequently changing values. Compress data where possible.
Log file growing very large	Excessive Print() or debug logging	Remove or guard debug Print() calls behind #ifdef DEVELOPER or a debug flag. Large log files can slow disk I/O.
High entity count causing server lag	Too many spawned entities in die Welt	Reduce nominal values in types.xml. Clean up dynamic objects with lifetime management. Limit AI spawn density.

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7. Item, Vehicle, and Entity Issues

Problems with custom items, vehicles, and world entities.

Symptom	Cause	Fix
Item wird nicht spawn (admin tools say "cannot create")	scope=0 in config or missing from types.xml	Set scope=2 in your item's CfgVehicles config for items that sollte spawnable. Add an entry to your server's types.xml if der Gegenstand should appear in loot.
Item spawns but is invisible	Model path (.p3d) is wrong or missing	Check the model path in your CfgVehicles class. Use forward slashes. Verify the .p3d file exists and is packed in your PBO.
Item has no inventory icon	Missing or wrong inventorySlot or icon config	Define the picture path in your config pointing to a valid .paa or .edds icon file. Check rotationFlags for correct icon orientation.
Vehicle spawns but wird nicht drive	Missing engine, wheels, or parts	Ensure all erforderlich parts are attached. Use OnDebugSpawn() to spawn a fully assembled vehicle for testing. Check that simulation type is correct in config.
Item kann nicht picked up	Incorrect geometry or wrong inventorySlot	Verify der Gegenstand has proper Fire Geometry in the model. Check that the itemSize[] is set correctly and der Gegenstand fits in available inventory slots.
Entity immediately deleted after spawn	lifetime is zero in types.xml or scope issue	Set appropriate lifetime value in types.xml. Ensure scope=2 in config. Check server cleanup settings in globals.xml.
Custom animal/zombie macht nicht move	AI config missing or broken	Verify AIAgentType in config. Check that die Entität has proper NavMesh-compatible geometry. Test with vanilla AI configs first.
Attachments mache nicht snap to item	Wrong inventorySlot names	Attachment slot names must match exactly between der Elternteil item's attachments[] and das Kind item's inventorySlot[]. Names are case-sensitive.
Item damage zones not working	DamageSystem config mismatch with model	Each DamageZone name must match a named selection in the model's Fire Geometry LOD. Check with Object Builder. See Chapter 6.1.
Custom sound macht nicht play	Sound shader or config path wrong	Verify the sound shader class name in CfgSoundShaders and CfgSoundSets. Check that the .ogg file path is correct and the file is packed in the PBO.
Item has wrong weight or size	weight and itemSize[] config values	weight is in grams (integer). itemSize[] defines the inventory grid slots as {width, height}. Check parent class values if inheriting.
Crafting recipe not appearing	Recipe config or condition wrong	Check CfgRecipes registration. Verify both ingredient items have correct canBeSplit, isMeleeWeapon, or other erforderlich properties. Test with vanilla recipe configs as reference.

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8. Config and Types Issues

Problems with config.cpp, types.xml, and other configuration files.

Symptom	Cause	Fix
Config values not taking effect	Using binarized config but editing source	Rebuild your PBO after config changes. If using file patching, ensure DayZDiag_x64.exe and -filePatching are active.
types.xml changes ignored	Editing the wrong types.xml file	Der Server loads types from mpmissions/your_mission/db/types.xml. Editing a types file elsewhere has no effect. Check the server's active mission folder.
"Error loading types" on server start	XML syntax error in types.xml	Validate your XML. Common issues: unclosed tags, missing quotes on attribute values, or & stattdessen of &. Use an XML validator.
Items spawn with wrong quantities	quantmin/quantmax values incorrect	Values are percentages (0-100) in types.xml, not absolute counts. -1 means "use default".
Loot table not spawning items	nominal is 0 or missing category/usage/tag	Set nominal above 0. Add at least one <usage> and <category> tag so the Central Economy knows where to spawn items.
JSON config file not loading	Malformed JSON or wrong path	Validate JSON syntax (no trailing commas, proper quoting). Use $profile: prefix for server profile paths. Check that the file exists with FileExist().
cfgGameplay.json changes ignored	File not enabled or wrong location	Place the file in the mission folder. Set enableCustomGameplay to 1 in serverDZ.cfg. Restart der Server (not just reload).
Class inheritance not working in config	baseClass misspelled or not loaded	Der Elternteil class must exist in the same or earlier addon. Check that requiredAddons[] includes the addon defining der Elternteil class.

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9. Persistence Issues

Problems with data saving and loading across server restarts.

Symptom	Cause	Fix
Player data lost on restart	Not saving to $profile: directory	Use JsonFileLoader<T>.JsonSaveFile() with a $profile: path. Save on player disconnect (PlayerDisconnected) and periodically during gameplay.
Saved file is empty or corrupt	Crash during write, or serialization error	Write to a temporary file first, then rename to the final path. Validate data before saving. Always handle FileExist() checks on load.
OnStoreSave/OnStoreLoad mismatch	Version changed but no migration	Always write a version number first. On load, read the version and handle old formats: if (version < CURRENT) { /* read old format */ }.
Items disappear from storage	lifetime expired in types.xml	Increase lifetime for persistent items. Standard is often too short for base-building containers. Check globals.xml cleanupLifetimeRuin value.
Custom variables reset on relog	Variables not synced or stored	Register variables for network sync with RegisterNetSyncVariable*(). For persistence, save/load in OnStoreSave()/OnStoreLoad().

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10. Decision Flowcharts

Step-by-step diagnostic processes for common "it doesn't work" situations.

"My mod doesn't work at all"

1. Check the script log for SCRIPT (E) errors. Lösung the first error you find. (Section 2)
2. Is the mod listed in the launcher? If not, check that mod.cpp exists and is valid. (Section 1)
3. Does the log mention your CfgPatches class? If not, check config.cpp syntax, requiredAddons[], and the -mod= launch parameter.
4. Do scripts compile? Look for compile errors in the RPT. Lösung any syntax errors. (Section 2)
5. Is there an entry point? You need a modded class MissionServer/MissionGameplay, a registered module, or a plugin. Scripts without an entry point never run.
6. Still nothing? Add Print("MY_MOD: Init reached"); at your entry point to confirm execution.

"Works offline but not on a dedicated server"

1. Is the mod installed auf dem Server? Check that -mod= includes your mod path and the PBO is in @YourMod/Addons/.
2. Client-only code on server? GetGame().GetPlayer() returns null during server init. Add GetGame().IsServer() / GetGame().IsClient() guards.
3. RPCs working? Add Print() on both send and receive sides. Check that RPC IDs match and target entity exists auf beiden Seiten. (Section 3)
4. Data syncing? Verify SetSynchDirty() is called after changes. Check read/write parameter order matches.
5. Timing issues? Listen servers hide race conditions because client and server share a process. Dedicated servers expose these. Add null checks and readiness guards.

"My UI is broken"

1. Does CreateWidgets() return null? The layout path is wrong or the file is missing. Check forward slashes, verify the .layout is packed in the PBO.
2. Widgets exist but invisible? Check sizes (muss > 0, no negative values). Check Show(true) is called. Check text/widget alpha ist nicht 0.
3. Visible but not clickable? Check widget priority (z-order). Verify ScriptClass is assigned. Confirm the handler is set.
4. Input stuck after closing UI? ChangeGameFocus() calls are imbalanced. Every ChangeGameFocus(1) needs a matching ChangeGameFocus(-1). Check cleanup runs even on force-close.

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11. Debug Commands Quick Reference

Use these in the DayZDiag debug console or admin tools.

Action	Command
Spawn item on ground	GetGame().CreateObject("AKM", GetGame().GetPlayer().GetPosition());
Spawn vehicle (assembled)	EntityAI car = EntityAI.Cast(GetGame().CreateObject("OffroadHatchback", GetGame().GetPlayer().GetPosition())); if (car) car.OnDebugSpawn();
Spawn zombie	GetGame().CreateObject("ZmbM_Normal_00", GetGame().GetPlayer().GetPosition());
Teleport to coords	GetGame().GetPlayer().SetPosition("6543 0 2114".ToVector());
Heal fully	GetGame().GetPlayer().SetHealth("", "", 5000);
Full blood	GetGame().GetPlayer().SetHealth("", "Blood", 5000);
Stop unconscious	GetGame().GetPlayer().SetHealth("", "Shock", 0);
Set noon	GetGame().GetWorld().SetDate(2024, 9, 15, 12, 0);
Set night	GetGame().GetWorld().SetDate(2024, 9, 15, 2, 0);
Clear weather	GetGame().GetWeather().GetOvercast().Set(0,0,0); GetGame().GetWeather().GetRain().Set(0,0,0);
Heavy rain	GetGame().GetWeather().GetOvercast().Set(1,0,0); GetGame().GetWeather().GetRain().Set(1,0,0);
Print position	Print(GetGame().GetPlayer().GetPosition());
Check server/client	Print("IsServer: " + GetGame().IsServer().ToString());
Print FPS	Print("FPS: " + (1.0 / GetGame().GetDeltaT()).ToString());

Common Chernarus locations: Elektro "10570 0 2354", Cherno "6649 0 2594", NWAF "4494 0 10365", Tisy "1693 0 13575", Berezino "12121 0 9216"

Launch Parameters

Parameter	Purpose
-filePatching	Load unpacked files (requires DayZDiag)
-scriptDebug=true	Enable script debug features
-doLogs	Enable detailed logging
-adminLog	Enable admin log on server
-freezeCheck	Detect and log script freezes
-noSound	Disable sound (faster testing)
-noPause	Server macht nicht pause when empty
-profiles=<path>	Custom profile/log directory
-connect=<ip>	Auto-connect to server on launch
-port=<port>	Server port (default 2302)
-mod=@Mod1;@Mod2	Load mods (semicolon-separated)
-serverMod=@Mod	Server-only mods (not sent to clients)

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12. Log File Locations

Knowing where to look is half the battle.

Client Logs

Log	Location	Enthält
Script log	%localappdata%\DayZ\ (most recent .RPT file)	Script errors, warnings, Print() output
Crash dumps	%localappdata%\DayZ\ (.mdmp files)	Crash analysis data
Workbench log	Workbench IDE output panel	Compile errors during development

Server Logs

Log	Location	Enthält
Script log	<server_root>\profiles\ (most recent .RPT file)	Script errors, server-side Print()
Admin log	<server_root>\profiles\ (.ADM file)	Player connections, kills, chat
Crash dumps	<server_root>\profiles\ (.mdmp files)	Server crash data
Custom logs	<server_root>\profiles\	Any logs written with FileHandle

Reading Logs Effectively

• Search for SCRIPT (E) to find script errors
• Search for SCRIPT ERROR to find fatal script problems
• Search for your mod name or class names to filter relevant entries
• Errors often cascade -- fix the first error in the log, not the last
• Timestamp each log read: the most recent .RPT file has the latest session

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13. Where to Get Help

When this guide macht nicht solve your problem, these are the best resources.

Community Resources

Resource	URL	Best For
DayZ Modding Discord	discord.gg/dayzmods	Real-time help from experienced modders
Bohemia Interactive Forums	forums.bohemia.net/forums/forum/231-dayz-modding/	Official forums, announcements
DayZ Feedback Tracker	feedback.bistudio.com/tag/dayz/	Official bug reports
DayZ Workshop	Steam Workshop (DayZ)	Browse published mods for reference
Bohemia Wiki	community.bistudio.com/wiki/DayZ:Modding_Basics	Official modding basics

Reference Source Code

Study these mods to learn patterns from experienced modders:

Mod	What to Learn
Community Framework (CF)	Module lifecycle, RPC management, logging, managed pointers
DayZ Expansion	Large-scale mod architecture, market system, vehicles, parties
Community Online Tools (COT)	Admin tools, permissions, UI patterns, player management
VPP Admin Tools	Server administration, permissions, ESP, teleportation
Dabs Framework	MVC pattern, data binding, UI component framework
BuilderItems	Simple item mod structure (good starting example)
BaseBuildingPlus	Building system, placement mechanics, persistence

Vanilla Script Reference

The authoritative reference for all engine classes and methods:

• Mount P: drive via DayZ Tools
• Navigate to P:\DZ\scripts\
• Organized by layer: 3_Game/, 4_World/, 5_Mission/
• Use your editor's search to find any vanilla class, method, or enum

Quick Checklist Before Asking for Help

Before posting in a community forum or Discord, gather this information:

1. What you expected to happen
2. What actually happened (exact error messages, behavior)
3. Script log excerpt (the relevant SCRIPT (E) lines, not the entire log)
4. Your code (the relevant section, not the entire mod)
5. What you already tried (saves everyone time)
6. DayZ version and mod list (compatibility matters)
7. Client or server (specify which side has the problem)

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Quick Symptom Index

Cannot find your problem in the sections above? Try this alphabetical index.

Symptom (what you see)	Go to
Addon Builder fails	Section 5
Array index out of range	Section 2
Buttons not clickable	Section 4
Cannot convert type	Section 2
Cannot create instance	Section 2
Config parse error	Section 1
Cursor missing	Section 4
Division by zero	Section 2
Data lost on restart	Section 9
Entity deleted after spawn	Section 7
File patching not working	Section 5
FPS drops	Section 6
Game input stuck	Section 4
Image not showing	Section 4
Item invisible	Section 7
Item won't spawn	Section 7
JSON not loading	Section 8
Layout returns null	Section 4
Loot not spawning	Section 8
Member already defined	Section 2
Memory leak	Section 6
Method not found	Section 2
Mod not in launcher	Section 1
Null pointer access	Section 2
Player data lost	Section 9
PBO signature failed	Section 5
Prefix mismatch	Section 5
RPC not received	Section 3
Scroll not working	Section 4
Save file corrupt	Section 9
Server crash beim Start	Section 2
Slider not responding	Section 4
Stack overflow	Section 2
Text shows STR key	Section 4
Types.xml ignored	Section 8
Undefined variable	Section 2
Variable redeclaration	Section 2
Vehicle won't drive	Section 7
Widget invisible	Section 4
Works offline fails online	Section 3

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Problem still unsolved? Check the FAQ for additional answers, the Cheat Sheet for syntax reference, or ask in the DayZ Modding Discord.