How To Fix FINS_RECON350 - Item in BSEG without BSID_BCK/BSAD_BCK: &1 message(s)

FINS_RECON350 - Overview

• Message type: E = Error

• Message class: FINS_RECON - SAP S/4HANA Finance Migration: Reconciliation

• Message number: 350

• Message text: Item in BSEG without BSID_BCK/BSAD_BCK: &1 message(s)

What causes this issue?

There are line items in table BSEG which are neither available in the
index table BSID_BCK nor in the index table BSAD_BCK.

System Response

The system informs about this inconsistency which has to be corrected in
your productive system before starting the data migration.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

FINS_RECON350 - Details

• The SAP error message FINS_RECON350 indicates that there is an issue with the reconciliation of line items in the BSEG table, specifically that there are items in BSEG that do not have corresponding entries in the BSID_BCK (for open items in accounts receivable) or BSAD_BCK (for open items in accounts payable) tables. This can occur during the reconciliation process when the system expects to find a matching entry in the backup tables but does not.
  Causes:
  
  Data Inconsistency: There may be inconsistencies in the data due to incomplete postings, manual changes, or errors during data migration.
  Missing Entries: The entries in BSEG may not have been properly created in the BSID_BCK or BSAD_BCK tables, possibly due to issues during document posting.
  Document Deletion: If a document was deleted or reversed, it might leave orphaned entries in BSEG without corresponding entries in the backup tables.
  Custom Development: Custom programs or enhancements may have inadvertently caused discrepancies