Error opening captured frame from project made with UE4 + DX12

Hello,

I made a simple project with UE4 (version 4.20.3), to check if it's possible to capture a frame using DX12 with the last version of GPA (18.3).

The capture worked (ctrl-shift-C) and I see a file saved with the .gpa_frame extension in the Docs/GPA folder.

But if I try to open it with the Frame Analyzer I get this error:

"An internal error occured. Graphics Frame Analyzer may fail to work correctly. Reopen the frame to fix the issue.".

I tried more times to reopen the frame, but without success.

Is there anything I can do? I'm using a PC with a GeForce 1080 ti and the latest nvidia drivers (416.34).

Thanks,

Fabio