I pressed the wrong button and i don't know how to fix it

Hi, everything was running fine before. Then  I want to have a lock if another display is more suitable for me. I changed from qtdragon to some other one’s .Now  linuxcnc didn't start anymore. Does anybody know what I did wrong?

You probably want to change this line in your ini file:

DISPLAY=qtvcp qtdragon

To this:

DISPLAY=qtdragon

( Your ini file is /home/seb/linuxcnc/configs/cnc/cnc.ini )
 

This is your issue
Debug file information:
Note: Using POSIX realtime
./custom.hal:5: parameter or pin 'plasmac.ohmic-sense-off-delay' not found

If the change to the display was all you made change it back to the original.

A bit of advice, back things up before messing around, saves a lot of headaches.
It helps to post the hal & ini files, it's hard to say "this is it, do x & y" without your files.

More importantly, what are plasmac pins doing inside a QTDragon config?
Those do not go together, one is for plasma machines, the other for mills.

Hi, thank you for your help. But changing the name didn't work.  I just made a compiled new configuration. I think it is faster and better in the long run too. I'm afraid it will bite me in the … later on. If I don't find every mistake I made.