2964909 - Sum error: Invalid substring access: Length 0 at phase PREP_EXTENSION/UNINSTALL_PACKAGES_CHECK

When trying to perform system upgrade by SUM tool, face below error at phase PREP_EXTENSION/UNINSTALL_PACKAGES_CHECK

- SUM/ABAP/LOGUNINSTPACKCHK.LOG

2EETQ360 RFC of "SPDA_ADJUST_DEL_PACKAGES" failed:
2EETQ361 code/exception : 3
2EETQ362 key : DATA_LENGTH_0
2EETQ399 Invalid substring access: Length 0
4 ETQ010 Date & Time: <date and time> 
1EETQ399 Last error code set is: RFC system <SID> nr ## function 'SPDA_ADJUST_DEL_PACKAGES'
1EETQ399XRFC failed with code 3 key DATA_LENGTH_0:
1EETQ399XInvalid substring access: Length 0
1EETQ204 Upgrade phase "UNINSTALL_PACKAGES_CHECK" aborted with severe errors ("<date and time>")

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SAP AS ABAP system.

SAP NetWeaver 2004 ; SAP NetWeaver 7.0 ; SAP NetWeaver 7.1 ; SAP NetWeaver 7.2 ; SAP NetWeaver 7.3 ; SAP NetWeaver 7.4 ; SAP NetWeaver 7.5 ; SAP NetWeaver Application Server for ABAP 7.1 ; SAP NetWeaver Application Server for ABAP 7.2 ; SAP enhancement package 1 for SAP NetWeaver 7.0 ; SAP enhancement package 1 for SAP NetWeaver 7.3 ; SAP enhancement package 1 for SAP NetWeaver Application Server for ABAP 7.1 ; SAP enhancement package 2 for SAP NetWeaver 7.0 ; SAP enhancement package 3 for SAP NetWeaver 7.0

Software Update Manager, SUM, S4HANA Upgrade error, Uninstallation, de-install, UNINSTALL_PACKAGES_CHECK, RFC failed with code 3 key DATA_LENGTH_0, Invalid substring access, Length 0, 2942234. , KBA , BC-UPG-OCS-SPA , Support package tools for ABAP , Problem