How To Fix TU023 - Cannot maintain fields 'MR Together with' and 'Main MRU' at the same time

SAP Error Message - Details

• Message type: E = Error

• Message class: TU - Billing/Scheduling/Budget Billing

• Message number: 023

• Message text: Cannot maintain fields 'MR Together with' and 'Main MRU' at the same time

What causes this issue?

It is not possible to maintain both these fields at the same time. A
meter reading unit must be either a main meter reading unit or an
allocated meter reading unit, or neither of these.

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?

Maintain either the "Together with" field or the "Main MRU" field, or
leave both fields blank.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TU023 - Cannot maintain fields 'MR Together with' and 'Main MRU' at the same time ?

  The SAP error message TU023, which states "Cannot maintain fields 'MR Together with' and 'Main MRU' at the same time," typically occurs in the context of maintaining material master data, particularly in the area of material requirements planning (MRP) or when dealing with material types that have specific settings.
  Cause:
  This error arises when there is an attempt to set both the "MR Together with" and "Main MRU" fields simultaneously in the material master record. These fields are mutually exclusive, meaning that you can only maintain one of them at a time. The "MR Together with" field is used to specify a grouping for MRP purposes, while the "Main MRU" (Material Requirements Unit) field is used to define the primary unit of measure for MRP calculations.
  Solution:
  To resolve this error, you need to ensure that you are only maintaining one of the two fields at a time. Here are the steps to follow:
  
  
  Access the Material Master Record: Go to the transaction code MM02 (Change Material) or MM01 (Create Material) depending on your requirement.
  
  
  Navigate to the Relevant View: Select the appropriate view where the fields "MR Together with" and "Main MRU" are located (usually in the MRP or Basic Data views).
  
  
  Check Field Values:
  
  If you want to maintain the "MR Together with" field, ensure that the "Main MRU" field is left blank.
  Conversely, if you want to maintain the "Main MRU" field, ensure that the "MR Together with" field is left blank.
  
  
  
  Save Changes: After making the necessary adjustments, save the material master record.
  
  
  Related Information:
  
  
  Field Definitions:
  
  MR Together with: This field is used to group materials for MRP purposes, allowing for collective planning.
  Main MRU: This field defines the primary unit of measure for the material, which is crucial for inventory management and planning.
  
  
  
  Transaction Codes:
  
  MM01: Create Material
  MM02: Change Material
  MM03: Display Material
  
  
  
  Documentation: Refer to SAP Help documentation for more details on material master data management and MRP settings.
  
  
  User Roles: Ensure that you have the necessary authorizations to make changes to the material master data.
  
  
  By following these steps and understanding the relationship between the fields, you should be able to resolve the TU023 error effectively.