"Unable to start debugging"

Development Getting Started & Setup
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1

Hi

I am trying to convert a 4.27 project to 5.4 but I cannot run it

I had a warning asking me to add these lines

    DefaultBuildSettings = BuildSettingsVersion.V5;
    IncludeOrderVersion = EngineIncludeOrderVersion.Latest;

  • no matter what I cannot run the project from VS, while it is building perfectly fine

  • I cannot load it in the Editor either

thanks for your help

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2

Last week I tried to downgrade a project from UE 5.4 to 5.3 and had to change the ‘DefaultBuildSettings’ in the Target.cs files from ‘BuildSettingsVersion.V5’ to ‘.V4’.

Launching the editor via VS debugging worked, but I didn’t know then that the assets can’t be downgraded.

Guess you need to modify the Target.cs files as the warning message suggested.

3

as mentioned in my post, that’s what I have done

4

Hmm… Not sure if that would help, but did you select your project in VS and ‘set as startup project’ ?