@NewSense:

Ok, here it works now.
1. Please take a look into the .ppd files. Drop any row with "*cupsfilter..." and rebuild the driver and profile.
2. Don't use the PRINTER:... mountlist. Use PAR: and change the device and unit in the textfile.
3. The new printersystem is postscript only at this time. Don't use a nonpostscript printer.

@ Zukow:

I can't change the device and unit for PRINTER:
The mountlist below did't work for me.
But i had seen that the printersystem generate a simple postscriptfile.
So i can simple use PAR: to send this simple postscriptfile directly to my Color Laserjet with postscript emul.



/* $VER: PRINTER 50.1 (04.03.2018)
*
* printer-handler mount entry
*/

Handler = MOSSYS:l/printer-handler
StackSize = 4096
Priority = 5
GlobVec = -1
Startup = "DEVICE=netprinter.device UNIT=0 TYPE=parallel"