During an upgrade, SUM is stuck at phase MAIN_POSTPROC/RUNASYN_RSTRCONUPD due to an error similar to the below example:
RFC login to system <SID> ashost <hostname> nr <instance number> gwhost <hostname> gwservice
sapgw00 failed with code 1 key RFC_COMMUNICATION_FAILURE: Timeout while opening an RFC connection.
During phase PREP_PREPROC/ASCS_ASK, ASCS Instance Split option was selected, similar to the below:
01) * Yes, perform ASCS Instance Split during execution
02) - No, keep Single Instance Setup
: Yes, perform ASCS Instance Split during execution
SAP NetWeaver - All Releases
Upgrade, Update, Profiles, ASCS, Split, Conversion, Profiles, Enqueue, Server , KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , Problem
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