4.15 Local Windows Debugger - System cannot find the file specified

Attempting to launch the Live Windows Debugger gives us the following message:

Unable to start program ‘C:\Program Files\Epic Games\UE_4.15\Engine\Intermediate\Build\Unused\UE4.exe’.

The system cannot find the file specified.

We are working on a project we converted in place from 4.14.

We came to realize just now that this happens because the UE4 source code project seen in Visual Studio had been set as StartUp project.

Right-clicking our own project and selecting Set as StartUp project made our project show with bold letters, indicating that it had been correctly set now. It now runs the Live Windows Debugger just fine.

We extend our thanks to this issue for helping us resolve the problem:


Thanks! Searching for the reason was a pain i.t.A… now I know why sometimes debugging started correctly and sometimes not…