we just migrated a test System from 7.3 to 7.4 on HANA.
I converted all cubes to HANA-optimized using TA RSMIGRHANADB. It worked for all cubes except of one. The cube SD_C01 brings an error, that the execution of stored procedure faild with error text: column store error:  flatten Scenario Failed.
Up to now I thought stored procedures are HANA only, therefore there must be a Standard procedure and I wonder how this can fail in conversion?
Does someone have an idea how I can fix this issue?
Another Point is the optimization of SPO's which is given as an Option in the TA. It always give the error that there is no a-Version of the SPO, but the SPO is active and working.
Attached are some screenshots, mostly in german.
Thanks for any help offered.