You are doing upgrade with SUM and encountering below error in phase MAIN_UPTRANS/MSACL_INST.
Severe error(s) occurred in phase MAIN_UPTRANS/MSACL_INST!
Last error code set:
Cannot open '' mode='a': No such file or directory
3 ETQ399 Retrieved profile value 'ms/acl_info' as ''.
2 ETQ399 file '' already exists - nothing to do
1EETQ399 Last error code set is: Cannot open '' mode='a': No such file or directory
1EETQ204 Upgrade phase "MSACL_INST" aborted with severe errors
MAIN_UPTRANS/MSACL_INST; ms/acl_info; No such file or directory; Cannot open; '' mode='a' , KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , Problem
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