Hi All,
I also faced a similar issue during upgrade. Some useful findings.
1. Only super user can access this /n/ASU/START
2. All the obligatory executable tasks are automatically performed by the system automatically during upgrade. SAPADM. Only errors (if any) are to be corrected.
3. Some of the tasks are only to go through some SAP notes as a precaution before upgrade.
4. Execute all the checks /n/ASU/UPGRADE
5. This surely can be skipped, but not advisable.
regards,
Amit