Hello,
Try setting the parameter "login/quiet_mode = 0".
This will not fix the "rabax during login" issue, but it will make the SAP kernel write more information at the trace files (and most likely create an ST22 dump) from the issue.
If this does not help, try capturing a level 2 trace from the issue could help.
The parameters in this case would be:
- rdisp/TRACE_COMPS = all, AMY
- rdisp/TRACE = 2
Regards,
Isaías