Your system is not installed with sybase database.
You are upgrading your system with Software Update Manager (SUM).
The error "Missing file '--/SUM/abap/exe/exe_syb.lst'" happens in the upgrade phase PREP_SPACECHECKS/FREECHK.
All SAP Systems based on SAP Netweaver ABAP
instancedb.lst, SUM, exe_syb.lst, kernel, sybase, oracle, sql server, HANA, DMO,PREP_SPACECHECKS,FREECHK , KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , Problem
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