Troubleshooting

Plugin failed to load — module GlobalCore could not be found

When you enable Operating System Simulator on a project that has not been compiled with the plugin yet, Unreal may show:

Plugin 'OperatingSystemSimulator' failed to load because module 'GlobalCore'
could not be found. Please ensure the plugin is properly installed, otherwise
consider disabling the plugin for this project.

GlobalCore is a C++ module shipped with the plugin. The editor looks for compiled module binaries; until you build the project once with the plugin enabled, that module is missing.

Fix — generate project files and build

1. Right-click your .uproject file in Windows Explorer.
2. Select Generate Visual Studio project files.
3. Open the newly generated .sln file in Visual Studio.
4. In Solution Explorer, right-click your game project (not the Engine target) and select Build.
5. When the build succeeds, reopen the project in Unreal Editor.

flowchart LR
  UProject[".uproject"] --> Gen["Generate VS project files"]
  Gen --> SLN["Open .sln"]
  SLN --> Build["Build game project"]
  Build --> UE["Reopen Unreal Editor"]

Prerequisites

• Visual Studio (or your platform IDE) with Desktop development with C++ / Unreal Engine workload installed.
• If Generate Visual Studio project files is missing from the context menu, install the Unreal Engine version’s Visual Studio integration or run UnrealVersionSelector from the Engine install.

Blueprint-only projects

This fix still applies. Generating Visual Studio project files adds the Source/ folder and C++ project files your game needs so marketplace plugins can compile. You do not need to write C++ yourself — a successful build is enough for the plugin modules to load.

Still failing?

• Confirm Operating System Simulator appears under Edit → Plugins and is enabled for your project.
• Delete Binaries/ and Intermediate/ in your project folder, then repeat the build steps above.
• Verify the plugin installed under Plugins/ or the Engine marketplace folder without missing files.
• For help, join Discord or contact us.

flowchart TB
  subgraph row1[" "]
    direction LR
    Fail["Plugin failed to load"] --> GC{"Module GlobalCore could not be found?"}
  end
  subgraph row2[" "]
    direction LR
    VS["Generate Visual Studio project files + Build"] --- Files["Check plugin files / reinstall"]
  end
  subgraph row3[" "]
    direction LR
    OK["Reopen Unreal Editor"]
  end
  GC -->|Yes| VS
  GC -->|No| Files
  VS --> OK
  Files --> OK

CCTV — ERR_DATA_NULL / no CCTV actors in world

When BP_Prog_CCTV (or a child such as BP_Prog_CCTV_C) is registered on your operating system but no AOperatingSystemCCTVActor exists in the level, program installation fails during OS boot.

What the log means

The messages appear in order during UOperatingSystem::CreateProgramsFromRepository:

Log	Source	Meaning
Warning: CCTV data will not be created because no cctv actors was found in world.	UOperatingSystemCCTVProgramData::ShouldCreate	The CCTV data object checks the world for registered camera actors. None were found, so data creation is skipped.
Error: ERR_DATA_NULL - Data object was not created for BP_Prog_CCTV_C.	UOperatingSystem::CreateProgramsFromRepository	CCTV requires a data object (bRequiresData = true). Because ShouldCreate returned false, the OS reports a null data error for your program Blueprint.

flowchart TB
  Boot["OS boots · CreateProgramsFromRepository"]
  CCTV["BP_Prog_CCTV in Must Have Programs"]
  Should["ShouldCreate — any CCTV actors in world?"]
  Data["Create UOperatingSystemCCTVProgramData"]
  Err["ERR_DATA_NULL"]

  Boot --> CCTV --> Should
  Should -->|Yes| Data
  Should -->|No| Warn["Warning: no cctv actors"]
  Warn --> Err

Note

This happens at OS initialization, not only when the player opens the CCTV app. If CCTV is listed in Must Have Programs, the data object must be creatable as soon as the device boots.

Fix

1. Place at least one camera in the same level as your AOperatingSystemDeviceActor:
   • Drag BP_CCTV_Actor from OperatingSystemContent/Shared/Blueprints/Actors/CCTV/
   • Ensure Start Activated is true (default) so the actor registers on BeginPlay
2. Press Play again — the warning and error should disappear from the output log.
3. If you are not ready to use CCTV yet, remove BP_Prog_CCTV from your programs collection (DA_*_ProgramsCollection → Must Have Programs) until cameras are placed.

Still seeing the error?

Check	Action
Camera in a sub-level	Ensure the sub-level is loaded when the OS boots, or place cameras in the persistent level
Start Activated is false	Set to true, or call Activate on the camera before OS init
Wrong map	Cameras must be in the same world the player enters in PIE
Custom BP_Prog_CCTV child	Same rules apply — data class must be BP_Prog_CCTVData (or child) and cameras must exist

→ Full setup: CCTV setup · Camera actor

Related

• Getting started — enable plugin content and open the demo map
• Packaging — fix common cook / package errors