How To Fix MU120 - Sales material &1 must be a single material.

SAP Error Message - Details

• Message type: E = Error

• Message class: MU - Maintenance of structured materials

• Message number: 120

• Message text: Sales material &1 must be a single material.

What causes this issue?

You want to create material &V1& to be used in the context of logistical
materials as a sales material.
The material category of your material must be 00 (<LS>single material
</>), but material &V1& is material category &V2&.

System Response

To avoid a data inconsistency in the material master, the system stops
processing and does not allow you to create or change the material
master data.

How to fix this error?

If possible<(>,<)> change the value of the material category to value 00
(<LS>single material</>). If this is not possible<(>,<)> choose another
material.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MU120 - Sales material &1 must be a single material. ?

  The SAP error message MU120, which states "Sales material &1 must be a single material," typically occurs in the context of sales order processing or material management when the system expects a single material number but receives multiple entries or an invalid input.
  Cause:
  
  Multiple Material Entries: The error often arises when a user tries to enter multiple materials in a field that only accepts a single material number.
  Incorrect Configuration: There may be configuration issues in the material master or sales order settings that lead to this error.
  Data Entry Error: Users might inadvertently input a range of materials or a list instead of a single material number.
  Batch Input or Upload Issues: If data is being uploaded or processed in bulk, the format may not comply with the expected single material input.
  
  Solution:
  
  Check Input: Ensure that you are entering a single material number in the relevant field. Verify that there are no extra spaces or characters.
  Review Configuration: If you have access, check the configuration settings in the material master and sales order processing to ensure they are set up correctly.
  Use Correct Transaction: Make sure you are using the correct transaction code for the operation you are trying to perform. Some transactions may have specific requirements for material entry.
  Consult Documentation: Refer to SAP documentation or help files for the specific transaction you are using to understand the expected input format.
  Error Handling in Uploads: If you are uploading data, ensure that the file format and data structure comply with SAP requirements for single material entries.
  Contact Support: If the issue persists, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as VA01 (Create Sales Order), VA02 (Change Sales Order), or MM01 (Create Material) where this error might occur.
  Material Master Data: Understanding how material master data is structured in SAP can help prevent this error.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Training: Providing training for users on how to correctly enter material numbers can help reduce the occurrence of this error.
  
  By following these steps, you should be able to resolve the MU120 error and ensure that you are entering the correct data in SAP.