How To Fix C1132 - Unit used cannot be changed

SAP Error Message - Details

• Message type: E = Error

• Message class: C1 - Characteristics maintenance messages

• Message number: 132

• Message text: Unit used cannot be changed

What causes this issue?

You want to change the unit of measurement for a characteristic.
This is not allowed once allowed values have been maintained for the
characteristic, or once the characteristic is used.

System Response

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

How to fix this error?

Change your entries.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message C1132 - Unit used cannot be changed ?

  The SAP error message C1132 ("Unit used cannot be changed") typically occurs in the context of material management or inventory management when there is an attempt to change the unit of measure for a material that is already in use in transactions or has existing stock.
  Cause:
  
  Existing Transactions: The unit of measure for a material cannot be changed if there are existing transactions (like goods movements, purchase orders, etc.) that reference that material.
  Stock Levels: If there is stock on hand in the current unit of measure, SAP will prevent changes to ensure data integrity.
  Configuration Settings: Certain configuration settings in the material master may restrict changes to the unit of measure.
  
  Solution:
  
  Check Existing Transactions: Review any existing transactions related to the material. You can use transaction codes like MB51 (Material Document List) or ME23N (Display Purchase Order) to find related documents.
  Clear Stock: If there is stock in the current unit of measure, you may need to perform a stock transfer or adjust the stock to zero before attempting to change the unit of measure.
  Change Unit of Measure in a Different Way: If you need to change the unit of measure, consider creating a new material master record with the desired unit of measure instead of changing the existing one.
  Consult Configuration: If you have the necessary permissions, check the material master configuration settings in transaction MM02 (Change Material) to see if there are restrictions in place.
  Contact SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to your SAP support team or consulting SAP documentation for further assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM01 (Create Material), MM02 (Change Material), and MM03 (Display Material).
  Material Master Data: Understand the structure of material master data, including views related to purchasing, sales, and inventory management.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Permissions: Ensure that you have the necessary permissions to make changes to material master data.
  
  By following these steps, you should be able to resolve the C1132 error and successfully manage your material units of measure in SAP.