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Rollback Strategy for FP installation, if any issue occurs during the HF/FP installation .
Diagnosing the problem
Keep the file system backup and Database backup before applying FP/HF..
Resolving the problem
Full proof solution for rollback is :-
Restore the full file system and database backup .
Fast Solution :-
1. Each and every HF contains the information of changed files. Keep the backup of files before going for HF upgrade .
2. Run the CDT and export the data in XML format .
3. Restore the file system with file system back up and restore database backup, both of them taken before HF/FP installation.