How To Fix MDG_BS_MAT_ACCESS201 - Material &1: Base unit of measure &2 cannot be changed

SAP Error Message - Details

• Message type: E = Error

• Message class: MDG_BS_MAT_ACCESS - Message class for MDG Material Access Layer

• Message number: 201

• Message text: Material &1: Base unit of measure &2 cannot be changed

What causes this issue?

The base unit of measure for material &V1& was changed.

System Response

There are already GTINs defined that refer to the base unit of measure.
The base unit of measure must not be changed.
The base unit of measure is reset to its current value.

How to fix this error?

Before the base unit of measure can be changed, the GTINs have to be
deleted.

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 MDG_BS_MAT_ACCESS201 - Material &1: Base unit of measure &2 cannot be changed ?

  The SAP error message MDG_BS_MAT_ACCESS201 indicates that there is an issue with changing the base unit of measure for a material in the Master Data Governance (MDG) system. The error message typically states: "Material &1: Base unit of measure &2 cannot be changed." 
  Cause:
  
  Material Status: The material may be in a status that does not allow changes to the base unit of measure. For example, if the material is blocked or has been marked for deletion, changes may not be permitted.
  Dependencies: The base unit of measure may be linked to other data or processes that prevent it from being changed. For instance, if there are existing purchase orders, sales orders, or stock postings that reference the material, the base unit of measure cannot be altered.
  Configuration Settings: Certain configuration settings in the material master or in the MDG system may restrict changes to the base unit of measure.
  Data Consistency: The system may have detected inconsistencies in the data that prevent the change from being executed.
  
  Solution:
  
  Check Material Status: Verify the status of the material. If it is blocked or marked for deletion, you may need to change its status before attempting to modify the base unit of measure.
  Review Dependencies: Check for any existing transactions (like purchase orders, sales orders, or stock movements) that may be linked to the material. If such transactions exist, you may need to close or delete them before changing the base unit of measure.
  Consult Configuration: Review the configuration settings in the material master and MDG to ensure that there are no restrictions on changing the base unit of measure.
  Data Consistency Check: Run data consistency checks to identify any issues that may be preventing the change. Resolve any inconsistencies found.
  Use Change Request: If you are using MDG, ensure that you are following the correct process for submitting a change request for the material. This may involve creating a change request and having it approved before the change can take effect.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like MM02 (Change Material) or MM03 (Display Material) to check the material details.
  MDG Processes: Familiarize yourself with the MDG processes for managing material data, including how to create and process change requests.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on handling base unit of measure changes.
  Documentation: Review SAP documentation or help files related to material master data management and MDG for best practices and troubleshooting steps.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in MDG and material master data management.