The Party Merge process encounters two types of errors: data errors and procedure errors. After you fix the errors, you can resubmit the Party Merge process from Standard Request Submission. See: Processing Merge Batches.
The Party Merge process might fail at the batch or party level if any record contains corrupt data. If the Party Merge process encounters corrupt data, the entire batch fails, and none of the parties are merged. Users should be able to correct most data errors.
The Party Merge process can fail if any procedures were not correctly coded, registered, and tested. The Party Merge log identifies the procedure that caused the Party Merge process to fail. Procedure errors must be corrected by an application developer or administrator who has access to the error log, Merge Dictionary, and PL/SQL procedures.