HI Kavitha,
The best option would be restart SUM. The steps would be:
1) Stop SUM tool and make sure there are no leftover processes;
2) Set com.sap.sdt.severity to DEBUG in:
-SUM\sdt\param\logging.properties
-SUM\sdt\prop\logging.properties
-SUM\java\param\logging.properties
3) Start SUM tool again and repeat the failing phase.
Logs required for analysis:
-SUM\java\log
-SUM\java\trc
-SUM\sdt\log
-SUM\sdt\trc
Regards,
Hemanth