1. User and password Issues (Authentication/ Authorization) user lock, user id expiry, password change, lack of roles etc. 2. File system problems: BTC reads from the file system to update the database. File not opened, or corrupted, file sharing issues, file came with different characters, file not found as well. 3. Variants are not properly defined. 4. Dead locks issue (Lock mechanism congested) 5. Update mechanism failed 6. Table space over flow (ORA-1653; ORA-1654) 7. Table space max extent reached (ORA-1631; ORA-1632) 8. Archive struck (ORA-255; ORA-272) 9. The memory is not sufficient and errors (No Roll Area, PXA (Buffer), Page Errors) 10. Problem in the program and inputs (Indefinite loops like 1/0) 11. Dependent jobs/ events failure 12. Target systems are not available to process the jobs.