Hi,
I also faced the same problem today. And it got solved.
Solution applied.
1. Stop SUM ...** Caution: Dont Reset
2. Stop SAP Services
2. Download latest files of R3trans (421), tp(420) and lib_dbsl(420) and replace them in the kernel folder.
3. run SAPCPE for sync.
4. start SAP Services. ** Caution dont start SAP
5. Start SUM and repeat the Phase.
It is working fine..
Regards
Raghu