How To Fix MD251 - Please check the destinations for parallel MRP

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 251

• Message text: Please check the destinations for parallel MRP

What causes this issue?

No destinations have been entered in Customizing or none of the the
destinations (application server) entered are active.
In Customizing for MRP, you define the logical destinations (servers)
to be used for parallel processing.

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?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MD251 - Please check the destinations for parallel MRP ?

  The SAP error message MD251, "Please check the destinations for parallel MRP," typically occurs during the execution of the Material Requirements Planning (MRP) process. This error indicates that there is an issue with the configuration of the parallel processing of MRP runs, specifically related to the destinations that are set up for parallel processing.
  Cause:
  
  Configuration Issues: The destinations for parallel MRP processing may not be correctly configured in the system. This could include missing or incorrect settings in the MRP configuration.
  System Limitations: The system may have limitations on the number of parallel processes that can be executed, or there may be resource constraints.
  Master Data Issues: There may be issues with the master data (e.g., material master, plant settings) that prevent the MRP from being executed in parallel.
  Locking Issues: If there are locks on certain materials or plants, it may prevent the MRP from running in parallel.
  
  Solution:
  
  
  Check Configuration:
  
  Go to the MRP configuration settings in the SAP system (Transaction code: OMD0 or OMD1).
  Ensure that the parallel processing settings are correctly configured, including the number of parallel processes and the destinations.
  
  
  
  Review MRP Parameters:
  
  Check the MRP parameters for the materials and plants involved. Ensure that they are set up to allow for parallel processing.
  
  
  
  Monitor System Resources:
  
  Check the system resources (CPU, memory) to ensure that there are enough resources available for parallel processing.
  Use transaction codes like SM37 to monitor background jobs and see if there are any jobs that are stuck or causing issues.
  
  
  
  Check for Locks:
  
  Use transaction code SM12 to check for any locks on the materials or plants that might be preventing the MRP from running in parallel.
  
  
  
  Run MRP in Serial Mode:
  
  If parallel processing cannot be resolved, consider running the MRP in serial mode as a temporary workaround.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  MD01: MRP Run
  MD02: MRP Run for Single Material
  OMD0: MRP Configuration
  SM37: Monitor Background Jobs
  SM12: Display and Delete Locks
  
  
  
  Documentation: Refer to the SAP Help Portal for detailed documentation on MRP and parallel processing configurations.
  
  
  SAP Community: Engage with the SAP Community forums for insights and solutions shared by other users who may have encountered similar issues.
  
  
  By following these steps, you should be able to identify and resolve the cause of the MD251 error in your SAP system.