You hit this problem during Extraction phase when SUM performs this step - copy original kernel files from source system to SUM/abap/exe.
Kernel Upgrade will fix the issue.
Before Kernel Upgrade -->Kernel Version 741 SP 220
After Kernel upgrade --> Kernel Version 742 SP 118
KX_CPYORG, 1EETQ399 , SUM ERRORS, EXTRACTION PHASE, PREP_INPUT