Hello Ulrich,
Thanks you.
Your reply brings a bit more light in my sap-world 
The RfcInvalidParameterExceptions was thrown by setting incorrect data lengths on my side.
And i tried to register all parameters and expection as shown in FU 'SYSTEM_START_REG_SERVER', maybe that was one more mistake...
I solved the problem.
But i am wondering why the defintion of callbacks like this is NOT documented in any documentation. To solve this problem it eats 2 days of my rare time. A half day try to find the definition in documentation and a half day to create a ticket in sap.notes and here in the community. The replier of my sap.note give me no good response. He means i have to read the documentation and sent me a link to the normal sap-netweaver-documentation where ist nothing inside of my problem. It seems he wont solve my problem, because he didnt took a look inside. If he took a look inside the documentation he sent me, he would seen his answer was stupid.
Am not amused about that.
Maybe you can say that if you work there.
I think i am done with tickets at sap.notes. Really no good experience in last years for several tickets i had. Every problem i had i must solve by myself with help of searching in the internet.
A description like yours here (in the community) is what i expect from a normal support portal.
Thank you very very much guy
for your excellent support
Best regards
Guido