3483399 - SUM DMO, Log file (...) could not be found!, Cannot read XML file (...) No such file or directory

An error occurs in SUM phase MAIN_SWITCH/SUBMOD_MIG_SWITCH_NEW/SUBMOD_MIG_SER_DOWNTIME_IMP/EU_CLONE_MIG_DT_IMP. Other phases utilizing relative paths may also be impacted.

The error is similar to following:

Summary of Error:
=================
- Module:              MAIN_SWITCH/Downtime I: Switch tables and Kernel
- Phase Name:          MAIN_SWITCH/SUBMOD_MIG_SWITCH_NEW/SUBMOD_MIG_SER_DOWNTIME_IMP/EU_CLONE_MIG_DT_IMP
- Phase Log File:      EUMIGRATEDTIMP_NEW.LOG
- Error Message:       Last generated error message:
1 error during parallel execution of processes
Check individual logs 'SQLSTMTSTD_NEW.OUT' for details

Further details can be found in the mentioned logs:

EUMIGRATEDTIMP_NEW.LOG

2 ETQ101 Executing 1 processes sequentially.
3 ETQ120 <datetime> #1 (1): PID <PID> execute '~/bin/SAPuptool execdb ../../var/TRUNCTABS_NAT000.SQL', output written to '/usr/sap/<SID>/SUM/abap/log/SQLSTMTSTD_NEW.001'.
3WETQ122 <datetime> #1 (1): PID <PID> exited with status 20 'TRUNC_TABLES:TRUNCTABS_NAT000.SQL' (time:     1.0/    0.0/    0.0/963MB real/usr/sys/maxmem)
4 ETQ113 Run process with pid <PID>, finished with 20.
1WETQ399 Log Scanner: Log file 'log/TRUNCTABS_NAT000.LOG' could not be found!

SQLSTMTSTD_NEW.<EXT>

    PWD: /usr/sap/<SID>/SUM/abap/load/migrate_dt

EXECUTING /usr/sap/<SID>/SUM/abap/bin/SAPuptool execdb ../../var/TRUNCTABS_NAT000.SQL
1EETQ008 Error message: Cannot read XML file '../../var/TRUNCTABS_NAT000.SQL': No such file or
1EETQ009Xdirectory
1EETQ003 exit code: "20"

Database Migration Option of Software Update Manager.

KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , Problem