How To Fix MW135 - Plant exists already in plant group

SAP Error Message - Details

• Message type: E = Error

• Message class: MW - Messages IS-R / Allocation Tables

• Message number: 135

• Message text: Plant exists already in plant group

What causes this issue?

The plant already exists in the plant group entered.

System Response

A plant can only exist once in an allocation rule.

How to fix this error?

Delete the second entry.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MW135 - Plant exists already in plant group ?

  The SAP error message MW135 ("Plant exists already in plant group") typically occurs when you attempt to assign a plant to a plant group that already contains that plant. This is a validation error indicating that the plant is already part of the specified plant group, and therefore cannot be added again.
  Cause:
  
  Duplicate Assignment: The plant you are trying to assign to the plant group is already included in that group.
  Data Entry Error: There may have been a mistake in data entry, leading to an attempt to add the same plant multiple times.
  Configuration Issue: The plant group may have been incorrectly configured or set up in the system.
  
  Solution:
  
  
  Check Existing Assignments:
  
  Navigate to the relevant transaction (e.g., OX18 for plant groups) and check the current assignments of the plant group to confirm that the plant is already included.
  
  
  
  Avoid Duplicate Entries:
  
  If the plant is already part of the group, you do not need to add it again. You can proceed with your other tasks without making any changes to the plant group.
  
  
  
  Modify Plant Group:
  
  If you need to make changes to the plant group, consider removing the plant from the group if it is not needed, or ensure that you are working with the correct plant group.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help files related to plant groups and assignments for further guidance on managing plant assignments.
  
  
  
  Contact Support:
  
  If you believe this error is occurring inappropriately or if you need further assistance, consider reaching out to your SAP support team or consulting with an SAP expert.
  
  
  
  Related Information:
  
  Transaction Codes: Common transaction codes related to plant groups include OX18 (Maintain Plant Groups) and OX10 (Define Plants).
  SAP Notes: Check for any relevant SAP Notes that might address specific issues or bugs related to plant groups and assignments.
  User Roles: Ensure that you have the necessary authorizations to make changes to plant groups and that you are following the correct procedures as per your organization’s policies.
  
  By following these steps, you should be able to resolve the MW135 error and manage your plant assignments effectively.