Hi Christian,
For other issue
(SQL error 12801) error message returned by DbSl:
ORA-12801: error signaled in parallel query server P001
ORA-01452: cannot CREATE UNIQUE INDEX; duplicate keys found
(DB) INFO: disconnected from DB
Refer to solution in the thread https://scn.sap.com/thread/1450117
Hope this helps.
Regards,
Deepak Kori