How To Fix FIN_FB_RECON334 - Open item in BSEG, missing in BSIS (but available in BSAS)

FIN_FB_RECON334 - Overview

• Message type: E = Error

• Message class: FIN_FB_RECON - Conversion to S/4HANA: Reconciliation

• Message number: 334

• Message text: Open item in BSEG, missing in BSIS (but available in BSAS)

What causes this issue?

There are open line items in table BSEG which are <ZH>not</> available
in the index table BSIS but these open line items are already available
in the index table BSAS.

System Response

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

How to fix this error?

For more information, see
<DS:URLA.HTTPS://LAUNCHPAD.SUPPORT.SAP.COM/#/NOTES/2714344>SAP Note
2714344.</>

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FIN_FB_RECON334 - Open item in BSEG, missing in BSIS (but available in BSAS) ?

  The SAP error message FIN_FB_RECON334 indicates a discrepancy between the open items in the BSEG (Accounting Document Segment) table and the balance sheet items in the BSIS (Accounting: Secondary Index for G/L Accounts) table. This error typically arises when there are inconsistencies in the data due to various reasons, such as data migration issues, incorrect postings, or incomplete clearing of items.
  Causes:
  
  Data Migration Issues: If data was migrated from another system or during a system upgrade, inconsistencies may occur if the migration process did not correctly handle open items.
  Incorrect Postings: Manual errors during posting transactions can lead to discrepancies between the BSEG and BSIS tables.
  Clearing Issues: If an item was cleared in the BSEG but not updated in the BSIS, or if the clearing process was interrupted, it can lead to this error.
  Custom Developments: Custom programs or enhancements that manipulate financial data may inadvertently cause inconsistencies.
  Database Issues: Corruption or issues in