How To Fix /SAPAPO/RRP_PT156 - Unit &2 not possible for resource &1

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/RRP_PT -

• Message number: 156

• Message text: Unit &2 not possible for resource &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/RRP_PT156 - Unit &2 not possible for resource &1 ?

  The SAP error message /SAPAPO/RRP_PT156 Unit &2 not possible for resource &1 typically occurs in the context of Advanced Planning and Optimization (APO) when there is an issue with the unit of measure (UoM) assigned to a resource in the planning process. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  
  Unit of Measure Mismatch: The error indicates that the unit of measure (UoM) specified for a resource (e.g., a production resource or a transportation resource) is not compatible with the unit of measure expected by the system. This can happen if the resource is defined with a different UoM than what is being used in the planning scenario.
  
  
  Resource Configuration: The resource may not be configured correctly in the system, leading to inconsistencies in how it is referenced in planning.
  
  
  Master Data Issues: There may be issues with the master data for the resource or the product being planned, such as incorrect UoM settings.
  
  
  Solutions:
  
  
  Check Resource Configuration:
  
  Go to the resource master data in APO and verify the unit of measure settings. Ensure that the UoM defined for the resource matches the UoM being used in the planning process.
  
  
  
  Review Product Master Data:
  
  Check the product master data to ensure that the UoM is correctly defined and is compatible with the resource's UoM.
  
  
  
  Adjust Planning Parameters:
  
  If applicable, adjust the planning parameters or settings in the planning book to ensure that the correct UoM is being used.
  
  
  
  Update UoM in Planning Book:
  
  If the planning book is using a different UoM, consider updating it to match the UoM defined for the resource.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to the specific error message for any additional guidance or updates.
  
  
  
  Testing:
  
  After making changes, perform a test run to ensure that the error is resolved and that the planning process can proceed without issues.
  
  
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like /SAPAPO/RRP3 (for planning board) or /SAPAPO/RES01 (for resource overview) to check the resource and product settings.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide patches or updates.
  User Forums: Consider searching or posting in SAP community forums for additional insights from other users who may have encountered the same issue.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.