Editor is unable to compile newly created C++ actor class

Development Programming & Scripting
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1

I’m trying to create a new C++ actor class called DigitalAlarm, but the editor is producing the following error:

UE Error
UE Error2342×1008 230 KB

Where it says:

“Unhandled exception: UnauthorizedAccessException: Access to the path ‘F:_\UntitledCoopGame\plugins\AdvancedSessions\Binaries\Win64\UnrealEditor.modules’ is denied.”

I was able to locate this file in the directory above, but don’t seem to have any program capable of opening files of type “MODULES File”. Pretty much at a loss with what to do here, so any assistance would be greatly appreciated.

2

Hi there @Doodlebob_Senpai

Three things I would check with this that can cause it

  1. Ensure you’re not running into a file lock due to VS or UE Editor still being open when you’re trying to update the modules.
  2. Make sure you don’t have the files on a read-only drive or something of that nature.
  3. Ensure that the plugin files were built with the same version of UE that you’re trying to use it with. (Incompatibility on version can cause this error)
3

Much appreciated for the response! Unfortunately, neither appeared to be the issue, so I went ahead and nuked my plugins folder. I got a lot less errors after recompiling, but this is what’s being produced as of now:

UE Error2
UE Error22261×153 20.4 KB

4

I’ve made some progress, but still no luck in actually fixing my inability to compile C++ code. The following appears to be pointing at missing source files (which exist in other directories). I’ve attached a screenshot of the errors in VS2022 as well as the error output log in a .txt file:

Error List
Error List2014×185 24.9 KB

Error Log Output.txt (2.8 KB)

5

I was able to resolve MSB4019. The issue appeared to be that $(EngineDir) wasn’t being explicitly defined in the ScriptGeneratorUbtPlugin.ubtplugin.csproj file:

<Project Sdk="Microsoft.NET.Sdk">
  <Import Project="ScriptGeneratorUbtPlugin.ubtplugin.csproj.props" Condition="Exists('ScriptGeneratorUbtPlugin.ubtplugin.csproj.props')" />
  <Import Project="$(EngineDir)\Source\Programs\Shared\UnrealEngine.csproj.props" />

I was able to do so by rewriting the file with the following:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <EngineDir>F:\Epic Games\UE5_5\UE_5.5\Engine\</EngineDir>
  </PropertyGroup>
  <Import Project="ScriptGeneratorUbtPlugin.ubtplugin.csproj.props" Condition="Exists('ScriptGeneratorUbtPlugin.ubtplugin.csproj.props')" />
  <Import Project="$(EngineDir)\Source\Programs\Shared\UnrealEngine.csproj.props" />

Now I’m left with only errors CS2001 and MSB3073. Gonna keep investigating and reply with any updates.

6

Are you running as Admin by chance?

7

Yes sir, sure am.

Also, I managed to reduce the numbers errors down to 1; MSB3073. Here’s a screenshot and the output log:

Error MSB3073
Error MSB30731920×842 172 KB

Output log:
Error Log Output.txt (1.5 KB)

I also tried to remove my Binaries, Intermediate, and Saved files in my project workspace to see if that would help, but it only ended up removing my entire UE5 and Games directories.