How To Fix /ACCGO/CAS_FLLW_MSG634 - Application error: Mirror application document does not exist for &1

/ACCGO/CAS_FLLW_MSG634 - Overview

• Message type: E = Error

• Message class: /ACCGO/CAS_FLLW_MSG -

• Message number: 634

• Message text: Application error: Mirror application document does not exist for &1

Self-Explanatory Message

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/ACCGO/CAS_FLLW_MSG634 - Details

• The SAP error message /ACCGO/CAS_FLLW_MSG634 Application error: Mirror application document does not exist for &1 typically occurs in the context of the SAP Accounting and Financials module, particularly when dealing with the follow-up documents in the context of the Central Finance (CFIN) or similar scenarios.
  
  Cause:
  This error indicates that the system is unable to find a corresponding "mirror" application document for the specified document number (&1). This can happen due to several reasons:
  
  
  Missing Document: The mirror document that should exist in the target system (e.g., Central Finance) does not exist. This could be due to data transfer issues or if the document was not posted correctly.
  
  
  Incorrect Configuration: There may be configuration issues in the Central Finance setup or in the document mapping between the source and target systems.
  
  
  Data Replication Issues: There might be issues with the data replication process that prevents the mirror document from being created or updated.
  
  
  Document Deletion: The