2679110 - Error "Invalid or incomplete multibyte or wide character" during upgrade

Upgrade stops in phase of SUBMOD_SWITCH_BAS/SUBMOD_SWITCH_KERNEL/KX_SWITCH

Below error can be found in <SUM_DIRECTORY>/log/KX_SWITCH.LOG

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1EETQ399 Last error code set is: Cannot read directory '<DIR_CT_RUN>':

1EETQ399XInvalid or incomplete multibyte or wide character
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Note: Value of DIR_CT_RUN can vary as defined

Example:

DIR_CT_RUN= /usr/sap/<SID>/SYS/exe/uc/linuxx86_64/msg_server

• SUM
• Linux/AIX/Solaris

SUM,KX_SWITCH,Multibyte,Invalid,Incomplete,Wide,Upgrade,Read,Directory , KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , Problem