http://You are right Jurgen. There is not printer defaulting here.
I had to enter a printer (LOCL) manually for the TO to automatically print in foreground processing.
I checked my OMLV configuration, I compared it to a Sandbox environnment that for some reason prints well and they are the same.
So what else can it be that does not populate a printer in the output device field?
I checked SPAD also. It seems ok too.
Thanks again.