How To Fix PR134 - Forecast run for plant & already started

SAP Error Message - Details

• Message type: E = Error

• Message class: PR - Forecast: Help messages

• Message number: 134

• Message text: Forecast run for plant & already started

What causes this issue?

The system is already carrying out the forecast for plant &V1& as
another user has started the forecast run. The forecast cannot be
started a second time.

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 PR134 - Forecast run for plant & already started ?

  The SAP error message PR134, which states "Forecast run for plant & already started," typically occurs when you attempt to start a forecast run for a plant that is already in the process of executing a forecast. This can happen in the context of demand planning or forecasting within SAP's Advanced Planning and Optimization (APO) module or similar functionalities.
  Cause:
  
  Concurrent Execution: The most common cause of this error is that a forecast run for the specified plant is already in progress. SAP does not allow multiple forecast runs for the same plant to ensure data integrity and avoid conflicts.
  System Locking: The system may have a locking mechanism that prevents starting a new forecast run while another one is still active.
  Long-Running Processes: If a previous forecast run is taking longer than expected, it may lead to this error when trying to initiate a new run.
  
  Solution:
  
  Check Active Processes: Verify if there is an active forecast run for the plant. You can do this by checking the relevant transaction codes or logs in SAP that monitor background jobs or forecast runs.
  Wait for Completion: If a forecast run is currently in progress, you will need to wait for it to complete before starting a new one.
  Cancel or Terminate: If you determine that the active forecast run is stuck or taking too long, you may need to cancel or terminate it. This can usually be done through the job monitoring tools in SAP (e.g., transaction SM37).
  Review Logs: Check the logs for any errors or warnings that might indicate why the previous forecast run is still active or taking longer than expected.
  Consult with IT Support: If you are unable to resolve the issue, it may be necessary to consult with your IT support team or SAP Basis team to investigate further.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as:
  
  SM37: To monitor background jobs.
  MC.9: To check forecast results.
  MC.1: To view the forecast run status.
  
  
  SAP Notes: Check for any SAP Notes related to this error message for additional guidance or patches that may address known issues.
  Documentation: Review SAP documentation on demand planning and forecasting to understand the processes and best practices.
  
  By following these steps, you should be able to resolve the PR134 error and successfully initiate your forecast run.