How To Fix WER191 - Inversion flag value &1 is invalid

WER191 - Overview

• Message type: E = Error

• Message class: WER - Messages for the package WER

• Message number: 191

• Message text: Inversion flag value &1 is invalid

Self-Explanatory Message

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WER191 - Details

• Certainly! Here's detailed information about the SAP error message WER191 - Inversion flag value &1 is invalid:
  
  Error Message
  WER191: Inversion flag value &1 is invalid
  
  Cause
  This error occurs when an invalid or unexpected value is passed or set for the inversion flag in a function module, BAPI, or during a process related to goods movements, inventory management, or invoice verification in SAP.
  The inversion flag typically indicates whether a document or transaction should be inverted (reversed) or not. Valid values are usually predefined (e.g., 'X' for inversion, space or blank for no inversion). If the system receives a value outside the expected set, it triggers this error.
  Common scenarios causing this error:
  
  Custom code or user input passing an incorrect inversion flag value.
  Incorrect parameter mapping in BAPI calls or IDocs.
  Data inconsistencies or corrupted data in the document or transaction.
  Incorrect configuration or enhancement implementations.
  
  
  Solution
  
  
  Check the Inversion Flag Value:
  
  Identify where the inversion flag is being set or