How To Fix MW666 - &1 is not a valid follow-on document category

SAP Error Message - Details

• Message type: E = Error

• Message class: MW - Messages IS-R / Allocation Tables

• Message number: 666

• Message text: &1 is not a valid follow-on document category

What causes this issue?

You entered a follow-on document catgory that is not valid.
The following follow-on documents can be generated for an allocation:
Vendor purchase orders
Warehouse orders
Deliveries

System Response

The combination of selection criteria cannot be created.

How to fix this error?

Select a valid follow-on document category.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MW666 - &1 is not a valid follow-on document category ?

  The SAP error message "MW666 &1 is not a valid follow-on document category" typically occurs in the context of material management and inventory management processes. This error indicates that the system is unable to recognize the specified document category as a valid follow-on document for the operation you are trying to perform.
  Cause:
  
  Invalid Document Category: The document category you are trying to use does not exist or is not configured correctly in the system.
  Configuration Issues: The follow-on document category may not be set up in the customizing settings of SAP.
  Data Entry Error: There may be a typographical error in the document category you are trying to enter.
  Authorization Issues: The user may not have the necessary authorizations to access or create the specified document category.
  
  Solution:
  
  
  Check Document Category: Verify that the document category you are trying to use is valid. You can do this by checking the configuration in the SAP system.
  
  Go to the transaction code SPRO and navigate to the relevant configuration settings for document categories.
  
  
  
  Configuration Settings: Ensure that the document category is properly configured in the system. This may involve:
  
  Checking the settings under Material Management (MM) or Inventory Management (IM) modules.
  Ensuring that the document category is assigned to the correct transaction types.
  
  
  
  Correct Data Entry: Double-check the input for any typographical errors. Make sure that the document category is entered correctly.
  
  
  User Authorizations: Ensure that the user has the necessary authorizations to create or access the document category. This may involve checking user roles and permissions.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific details on valid document categories and their configurations.
  
  
  Contact SAP Support: If the issue persists after checking the above points, consider reaching out to SAP support for further assistance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MB1A, MB1B, MB1C, etc., which are used for various inventory movements and may relate to the document category in question.
  SAP Notes: Check for any SAP Notes related to this error message, as they may provide additional insights or patches that address the issue.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.