How To Fix MD357 - Plant &1 has already been assigned a different MRP area

SAP Error Message - Details

• Message type: E = Error

• Message class: MD - Material Requirements Planning (MRP)

• Message number: 357

• Message text: Plant &1 has already been assigned a different MRP area

What causes this issue?

Plant &1 has already been assigned to another MRP area.

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?

Choose another plant.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MD357 - Plant &1 has already been assigned a different MRP area ?

  The SAP error message MD357 indicates that there is a conflict in the assignment of MRP (Material Requirements Planning) areas to a plant. Specifically, it means that the plant you are trying to assign to a specific MRP area has already been assigned to a different MRP area in the system.
  Cause:
  
  Existing Assignment: The plant is already linked to another MRP area, which prevents it from being assigned to the new MRP area you are trying to configure.
  Configuration Error: There may be a misconfiguration in the MRP area settings or in the plant's master data.
  Data Inconsistency: There could be inconsistencies in the data related to MRP areas and plants, possibly due to previous changes or updates.
  
  Solution:
  
  
  Check Existing MRP Area Assignments:
  
  Go to the MRP area configuration in SAP (Transaction code: OMDU or similar).
  Check the existing assignments for the plant in question to see which MRP area it is currently assigned to.
  
  
  
  Reassign MRP Areas:
  
  If you need to change the assignment, you may need to remove the existing assignment of the plant from the current MRP area before assigning it to the new one.
  Ensure that the new MRP area is correctly set up and that it meets the requirements for the plant.
  
  
  
  Review Master Data:
  
  Check the material master data for the materials associated with the plant and MRP area. Ensure that there are no discrepancies or errors in the data.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help files related to MRP area configuration for any specific guidelines or best practices.
  
  
  
  Contact Support:
  
  If the issue persists, consider reaching out to your SAP support team or consulting with an SAP expert to investigate further.
  
  
  
  Related Information:
  
  MRP Areas: MRP areas are used in SAP to define specific areas within a plant for planning purposes. They allow for more granular control over inventory and production planning.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as OMDU (Define MRP Areas) and MD03 (Display MRP) to help navigate the MRP configuration.
  SAP Notes: Check for any SAP Notes related to MRP area assignments that may provide additional insights or solutions to known issues.
  
  By following these steps, you should be able to resolve the MD357 error and successfully manage MRP area assignments for your plant.