Hi,
after I have debugged through the system for a few days and asked all kinds of questions, the answer was strange but easy.
For some reason the configuration of table /syclo/PSH00 was incorrect. Order PUSH did point to ORDER_OPERATION_PUSH. So I needed to correct his in the EFI Portal and all works fine since.....
Sorry for the confusion, and thanx a lot for your great help. Finally I know now how the WorkManager 6.0 push works and where I need to change values to get different results.
Regards,
Oliver