Hi Dominik
How is the method FIND_BY_LPOR coded for CL_SWF_FORMABSENC?
I am sure its creating an instance (or reading from static list) .
There, the approver is not set !!! ????
Just to be sure - put a break point there, go to technical log, expand your CL_SWF_FORMABSENC container....the Break point will stop there. FIND_BY_LPOR gets called to get a runtime instance, by using CREATE OBJECT statement ..... so please first check if FIND_BY_LPOR is getting it or not.
regards,
Modak