How To Fix AH793 - Unknown calculation reason: &1

SAP Error Message - Details

• Message type: E = Error

• Message class: AH - IS-U billing (master data)

• Message number: 793

• Message text: Unknown calculation reason: &1

What causes this issue?

Document &v2& cannot be deleted due to an unknown calculation reason
&v1&.

System Response

Deletion has been terminated.

How to fix this error?

The document may be a legacy document that was created with an old
version. In Transaction EA16 (change mode), make a change and save it.
After that the document should be deletable. If it is not, there is an
inconsistency. Contact SAP in this case.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AH793 - Unknown calculation reason: &1 ?

  The SAP error message AH793, which states "Unknown calculation reason: &1," typically occurs in the context of the SAP system's handling of calculations, particularly in modules related to financials, controlling, or logistics. The error indicates that the system encountered a calculation reason that it does not recognize or that is not defined in the system.
  Cause:
  
  Invalid Calculation Reason: The calculation reason provided in the transaction or configuration is not valid or does not exist in the system.
  Configuration Issues: There may be missing or incorrect configuration settings in the relevant module (e.g., pricing, cost calculation).
  Data Entry Errors: Users may have entered an incorrect value or code that does not correspond to any defined calculation reason.
  Custom Development: If there are custom developments or enhancements, they may not be handling certain calculation reasons correctly.
  
  Solution:
  
  Check Configuration: Review the configuration settings for the relevant module (e.g., pricing, cost calculation) to ensure that all necessary calculation reasons are defined and correctly set up.
  Validate Input: Ensure that the input values for the calculation reason are correct and correspond to valid entries in the system.
  Review Documentation: Consult the SAP documentation or help files for the specific module to understand the valid calculation reasons and their meanings.
  Debugging: If you have access to debugging tools, you can trace the execution to see where the error is being triggered and what values are being passed.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide updates or patches.
  Contact SAP Support: If the issue persists and cannot be resolved through the above steps, consider reaching out to SAP Support for assistance.
  
  Related Information:
  
  Transaction Codes: Depending on the module, you may want to look at transaction codes related to configuration (e.g., SPRO for configuration settings).
  SAP Community: Engaging with the SAP Community forums can provide insights from other users who may have encountered similar issues.
  Testing: After making changes, conduct thorough testing to ensure that the error does not recur and that calculations are performed correctly.
  
  By following these steps, you should be able to identify the cause of the AH793 error and implement a solution to resolve it.