For me it runs without any crashes on the PSVita.

I used the latest build from June 23 2019.
But the Game runs in slow motion.
It is playable but not enjoyable.

Make sure you have selected the Standard Graphic options in the ScummVM Game options.

Would it be possible to add the Arrow Keys?
Maybe to the Second Analog-Stick.

Games like The Jorneyman Project: Pegasus Prime uses the Arrow Keys instead of the Numpad Keys for moving.

I will try that the next days. Actually the Windows Build works fine with my files.

Maybe a Problem with the Filenames? There are many Files with an dot and an underscore "._Filename.ext" for example. Maybe the PSP can´t handle Files beginning with an ".". There is an File called "._JMP PP Resources". This File (as well as any other File beginning with...

Yes. I used the HFSExplorer Method. As mentioned above the Game runs fine on Windows ScummVM. So I think the extracted Data is not the Problem.

The Journeyman Project: Pegasus Prime crashes after launching from the ScummVM Menu. ScummVM creates a SCUMMTRACE.TXT which says: Could not load JMP PP Resources! The Game works perfectly with the Windows Version of ScummVM. The Demo of the Game works great without any issues on the PSP. I am using ...

Of course I would test everything on my PSP if you want. You just need to tell me what exactly I need to do.

But the Problem is: I do not know anything about Programming or compiling.

There is a PSP emulator out there which can run ScummVM. It does not start any Scummvm games (The Emulator is still buggy). But the Menu and the adding of games can be tested very well. For debugging this ScummVM issue it could be very useful.

Here is the Link:
http://jpcsp.org/

Yes. I hope that too. It seems that the Myst crash is independent from the Game detection Crash. I thought it could be a Problem with writing the scummvm.ini. But when I change settings in the Game Launcher Menu of ScummVM, the changed settings are saved correctly in the scummvm.ini. So the Problem ...

Hm...
But where is the PSP Release of 1.5.0 ???

It is actually a much lot simplier. You can install a Custom Firmware on ANY PSP no matter what Firmware you have installed and you do not need any Pandora Battery or anything else.

Then you can run ScummVM and any Homebrew you want without any Problems.

For me it worked very well with Fat 16. And I was able use the whole 4GB. I did that a time ago in Windows XP via the Command-Line.

Bug reported to the Bug tracker.

Myst and Myst ME. I also noticed that Spyfox1 does not work either anymore. I am not sure what daily built version exactly was working good. I think the daily builds 2 or 3 weeks ago worked good. [EDIT] Sometime on March 19, 2012 there was a change in the Image Decoder. I am not sure, but I think fr...

The ScummVM 1.5.0git2821-g8c57c71 (Apr 5 2012 05:40:54) daily built version got a Problem with adding games to the List. Everytime I want to add a Game to the Launcher-list, ScummVM freezes on my PSP. Previous daily built versions worked very well. Also Myst does not work anymore. It crashes too whi...