Hi all,
while specifying a SAP tool I run into a problem.
My goal is, to get a jump from my tool to a transaction to change RESB-WEMPF and RESB-ABLAD.
During daily work the values are changed only by using transaction CJ20N (see red marked fields below) up to now.

Its not necessary for the jump to reach CJ20N for changing RESB-WEMPF and RESB-ABLAD.
My ideas are:
1. CALL TRANSACTION 'CJ20N' ...
Problem: how can the call navigate to the required element in project structure?
I think BDCDATA will not work, because different projects have different structures.
2. CALL TRANSACTION 'MB22' ...
Problem: Does not work because of message M7522 "Reservation created automatically. No manual changes possible"
3. Create an own dynpro with call of a SAP standard function to change the values.
Problem: I did not find this function module.
4. Update database by my own -> this can only be the last way
Do you have any hints for my problems or new ideas?
Kind Regards,
Hubert