How To Fix M8104 - Number & already assigned

SAP Error Message - Details

• Message type: E = Error

• Message class: M8 - Invoice Verification/Valuation

• Message number: 104

• Message text: Number & already assigned

What causes this issue?

The intercompany number you entered already exists in the system.

How to fix this error?

Overwrite your input with a new number.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M8104 - Number & already assigned ?

  The SAP error message M8104 ("Number & already assigned") typically occurs in the context of material management or inventory management when you attempt to create or assign a number (such as a material number, document number, etc.) that has already been used or assigned in the system. This can happen in various scenarios, such as creating a new material, posting a goods movement, or entering a document.
  Cause:
  
  Duplicate Number Assignment: The number you are trying to assign is already in use for another material or document.
  Number Range Issues: The number range configuration may not be set up correctly, leading to conflicts in number assignments.
  Data Entry Errors: There may be a typographical error in the number you are trying to enter, leading to confusion with existing numbers.
  
  Solution:
  
  
  Check Existing Assignments: Verify if the number you are trying to use is already assigned to another material or document. You can do this by searching for the number in the relevant transaction (e.g., MM03 for materials).
  
  
  Use a Different Number: If the number is indeed already assigned, you will need to choose a different number that is not in use.
  
  
  Review Number Ranges: Check the configuration of number ranges in the system. Ensure that the number range is correctly defined and that there are no overlaps or gaps that could cause issues.
  
  
  Consult with SAP Basis or Configuration Team: If you suspect that the issue is related to number range configuration, consult with your SAP Basis or configuration team to review the settings and make necessary adjustments.
  
  
  Transaction Logs: If you are unsure about the history of the number, you can check transaction logs or change documents to see where the number has been used.
  
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may use transaction codes like MM01 (Create Material), MM02 (Change Material), or MB1A (Goods Movement) to investigate the issue.
  Number Range Maintenance: You can access number range maintenance through transaction code SNRO or OBNR to review and adjust number ranges.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP Notes can provide additional insights or solutions specific to your version of SAP.
  
  If the problem persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.