Sorry to bother you a lot. I just seem to get error after error. I did the commando with the backslash i was missing, and it said: permission denied.
Then i tried the ls lh command and it shows:
"ls: lh: No such file or directory
/home/user/.local/share/mupen64plus/save/:
(then it shows me a list. But some save games are .sra, some are .fla and some are eep and mpk. In my case, it shows: POKEMON STADIUM (unknown Rom).fla
Now that you mention it, the emulator crashed and didnt respond after 20 minutes, so a screen prompted me to close it (mupen64plus not responding, close application?) i clicked yes after waiting. Then i opened it again and my advance was gone. How can i make a backup of the savegame and send it to you? Hope you can help me to recover my savefile. Thanks a lot