Hi Vittal,
I analyzed your attached dump file.
In your message you state that you were performing a restore however the dump is referring to an error during a backup?
Look at your attached dump file, lines 243 to 253 are the call stack of the ABAP dump. I have pasted a few select lines inline here:
4 CL_UJT_BACKUP_RESTORE_MGR=>CONVERT_TO_CSV
3 CL_UJT_BACKUP_RESTORE_MGR=>BUILD_MASTER_DATA
2 CL_UJT_BACKUP_RESTORE_MGR=>BACKUP_DATA
1 UJT_BACKUP_RESTORE_UI START-OF-SELECTION
The way to read this is from the bottom up following the line numbers. Essentially the UJBR program dies at the top line labeled with the number *4*. Notice on line 2, the second step in the execution of the program leading to the dump the 'BACKUP_DATA' method is called.
This leads me to believe that most likely you were attempting to perform a restore, however you clicked the BACKUP radio button, or, you uploaded the wrong dump file.
Hopefully this is helpful.
Cheers, Scott