How To Fix WM004 - Reference module & not found

SAP Error Message - Details

• Message type: E = Error

• Message class: WM - IS-R Assortments

• Message number: 004

• Message text: Reference module & not found

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WM004 - Reference module & not found ?

  The SAP error message WM004 ("Reference module & not found") typically occurs in the Warehouse Management (WM) module when the system is unable to find a reference module or document that is required for a specific operation. This can happen in various scenarios, such as during the creation of transfer orders, stock transfers, or other warehouse-related activities.
  Causes:
  
  Missing Reference Document: The reference document (like a purchase order, transfer order, or delivery) that you are trying to use does not exist in the system.
  Incorrect Document Type: The document type you are trying to reference may not be configured correctly or may not be valid for the operation you are performing.
  Data Inconsistency: There may be inconsistencies in the data, such as missing entries in the database or issues with the configuration of the WM module.
  Authorization Issues: The user may not have the necessary authorizations to access the reference document.
  System Configuration: The WM module may not be properly configured to recognize the reference document type.
  
  Solutions:
  
  Check Document Existence: Verify that the reference document you are trying to use actually exists in the system. You can do this by checking the relevant transaction (e.g., ME23N for purchase orders, VL03N for deliveries).
  Review Document Type Configuration: Ensure that the document type you are using is correctly configured in the system. This may involve checking the settings in the IMG (Implementation Guide) under the WM module.
  Data Consistency Check: Run consistency checks in the WM module to identify and resolve any data inconsistencies. This can often be done using transaction codes like LX02 or LX03.
  User Authorizations: Check the user roles and authorizations to ensure that the user has the necessary permissions to access the reference document.
  Consult with SAP Support: If the issue persists, it may be necessary to consult with SAP support or your internal SAP team to investigate further and resolve any underlying configuration issues.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as LT03 (Create Transfer Order), LT12 (Confirm Transfer Order), and others related to WM processes.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  Documentation: Review SAP documentation related to Warehouse Management for best practices and configuration guidelines.
  
  By following these steps, you should be able to identify the cause of the WM004 error and implement a solution to resolve it.