How To Fix /STTPEC/MC_MD078 - National code &1 with type &2 is already used in material &3 for UoM &4.

SAP Error Message - Details

• Message type: E = Error

• Message class: /STTPEC/MC_MD -

• Message number: 078

• Message text: National code &1 with type &2 is already used in material &3 for UoM &4.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /STTPEC/MC_MD078 - National code &1 with type &2 is already used in material &3 for UoM &4. ?

  The SAP error message /STTPEC/MC_MD078 indicates that there is a conflict with the national code assigned to a material in the system. Specifically, it means that the national code you are trying to assign to a material is already in use for another material with a different unit of measure (UoM). 
  Cause:
  
  Duplicate National Code: The national code you are trying to assign is already associated with another material in the system.
  Different Units of Measure: The existing material that uses the national code has a different unit of measure than the one you are trying to assign.
  Data Entry Error: There may have been a mistake in data entry, leading to the attempt to assign a national code that is already in use.
  
  Solution:
  
  
  Check Existing Assignments: 
  
  Use transaction codes like MM03 (Display Material) to check the materials that are already using the national code in question.
  Look for the material number (&3) and the unit of measure (&4) to see if the national code (&1) is already assigned.
  
  
  
  Change National Code: 
  
  If the national code is indeed in use, you will need to either choose a different national code that is not in use or modify the existing material to free up the national code.
  
  
  
  Review Material Master Data: 
  
  Ensure that the material master data is correctly maintained and that there are no unintended duplicates or conflicts.
  
  
  
  Consult with Your Team: 
  
  If you are unsure about which national code to use or how to proceed, consult with your team or a colleague who manages material master data.
  
  
  
  SAP Notes and Documentation: 
  
  Check SAP Notes or documentation for any specific guidelines or updates related to national codes and material management.
  
  
  
  Related Information:
  
  National Codes: These are often used for regulatory compliance, especially in industries like pharmaceuticals, chemicals, and food, where specific codes are required for tracking and reporting.
  Unit of Measure (UoM): Different materials can have different units of measure, and the same national code can be used across different UoMs, but it must be unique to each material.
  Material Master: The material master is a central repository of information about materials in SAP, and it is crucial to maintain it accurately to avoid conflicts like this.
  
  By following these steps, you should be able to resolve the error and ensure that your material master data is correctly maintained.