How To Fix LTR2_DS_CHG_MWBGEN021 - Table-based MWB generation for data model &1 was changed by &4

SAP Error Message - Details

• Message type: E = Error

• Message class: LTR2_DS_CHG_MWBGEN - Change log messages of data set Migration

• Message number: 021

• Message text: Table-based MWB generation for data model &1 was changed by &4

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message LTR2_DS_CHG_MWBGEN021 - Table-based MWB generation for data model &1 was changed by &4 ?

  The SAP error message LTR2_DS_CHG_MWBGEN021 indicates that there has been a change in the data model that is being used for the table-based Multi-Provider (MWB) generation. Specifically, it suggests that the data model identified by &1 has been modified by user &4, which can lead to inconsistencies or conflicts when trying to generate or work with the Multi-Provider.
  Cause:
  
  Concurrent Changes: The most common cause of this error is that multiple users are trying to modify the same data model at the same time. If one user makes a change while another is attempting to generate the MWB, this error can occur.
  Version Control: If the data model is under version control, changes made by another user may not be reflected in your current session, leading to this error.
  Locking Mechanism: SAP has a locking mechanism to prevent data inconsistencies. If the data model is locked by another user or process, you may encounter this error.
  
  Solution:
  
  Refresh the Data Model: If you suspect that the data model has changed, refresh your session or re-open the data model to ensure you have the latest version.
  Check for Locks: Use transaction codes like SM12 to check for locks on the data model. If another user has locked it, you may need to wait until they release the lock.
  Communicate with Team Members: If you are working in a team environment, communicate with your colleagues to ensure that no one else is making changes to the data model while you are trying to generate the MWB.
  Retry the Operation: After ensuring that no other changes are being made, try to generate the MWB again.
  Check Change Logs: If available, check the change logs for the data model to understand what changes were made and by whom.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as LTR2 for data modeling and RSRT for reporting.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Review SAP documentation on data modeling and Multi-Provider generation for best practices and troubleshooting steps.
  User Roles: Ensure that you have the appropriate permissions to access and modify the data model.
  
  If the issue persists after trying the above solutions, consider reaching out to your SAP Basis or technical support team for further assistance.