How To Fix MPN01023 - The external manufacturer & is already in use (see F4)

SAP Error Message - Details

• Message type: E = Error

• Message class: MPN01 - MPN Message: Material Master / customizing

• Message number: 023

• Message text: The external manufacturer & is already in use (see F4)

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MPN01023 - The external manufacturer & is already in use (see F4) ?

  The SAP error message MPN01023 indicates that the external manufacturer you are trying to use is already in use in the system. This typically occurs when you attempt to create or modify a record (such as a material or vendor) that references an external manufacturer that is already associated with another record.
  Cause:
  
  Existing Association: The external manufacturer is already linked to another material or vendor in the system.
  Data Entry Error: There may be a mistake in the data entry, such as trying to create a duplicate entry for an external manufacturer.
  Configuration Issues: There might be configuration settings in the system that prevent the use of the external manufacturer in multiple contexts.
  
  Solution:
  
  Check Existing Records: Use the F4 help (search help) to find out where the external manufacturer is already in use. This will help you identify the existing records that are associated with it.
  Modify Existing Records: If the external manufacturer is already linked to a record that you do not need, consider modifying or deleting that record if appropriate.
  Use a Different Manufacturer: If the external manufacturer is indeed in use and cannot be removed, you may need to select a different external manufacturer for your current task.
  Consult with Your SAP Administrator: If you are unsure about the implications of modifying or deleting records, consult with your SAP administrator or a colleague who has experience with the system.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like MM03 (Display Material), MM02 (Change Material), or ME11 (Create Purchasing Info Record) to view or modify the records associated with the external manufacturer.
  Documentation: Refer to SAP documentation or help files for more detailed information on managing external manufacturers and related records.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  
  By following these steps, you should be able to resolve the error and continue with your work in SAP.