How To Fix MDG_BS_MAT_ACCESS205 - 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: 205

• 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

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?

If you use cross-entity-derivation (BAdI USMD_RULE_SERVICE_CROSS_ET),
update not only the entity MATERIAL, but also entity UNITOFMSR.

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_ACCESS205 - Material &1: Base unit of measure &2 cannot be changed ?

  The SAP error message MDG_BS_MAT_ACCESS205 indicates that there is an issue with changing the base unit of measure for a material in the Master Data Governance (MDG) system. This error typically arises when there are dependencies or constraints that prevent the modification of the base unit of measure for the specified material.
  Cause:
  
  Existing Transactions: The material may already be involved in existing transactions (e.g., purchase orders, sales orders, stock movements) that reference the current base unit of measure.
  Material Type Restrictions: Certain material types have restrictions on changing the base unit of measure due to business rules or configurations.
  Data Consistency: The system may enforce data consistency rules that prevent changes to the base unit of measure if it would lead to inconsistencies in related data.
  Configuration Settings: The configuration settings in the material master may not allow changes to the base unit of measure after the material has been created.
  
  Solution:
  
  Check Dependencies: Review any existing transactions or documents that reference the material. If there are open transactions, you may need to close or delete them before changing the base unit of measure.
  Material Type Review: Verify the material type settings in the configuration. If the material type does not allow changes to the base unit of measure, you may need to create a new material with the desired base unit of measure.
  Data Consistency Check: Ensure that changing the base unit of measure will not violate any data consistency rules. You may need to consult with your SAP functional team to understand the implications of the change.
  Use of Alternative Units: If changing the base unit of measure is not possible, consider using alternative units of measure for transactions involving this material.
  Consult Documentation: Refer to SAP documentation or notes related to the specific error message for additional guidance and best practices.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like MM02 (Change Material) to attempt to change the material data, but be aware of the restrictions.
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or solutions for this specific error.
  User Authorization: Ensure that you have the necessary authorizations to make changes to the material master data.
  Testing in Sandbox: If possible, test the changes in a sandbox environment to understand the impact before applying them in the production system.
  
  If the issue persists after following these steps, it may be beneficial to engage with your SAP support team or consult with an SAP expert for further assistance.