How To Fix AH791 - Update type &1 not permitted for operand category &2

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 791

• Message text: Update type &1 not permitted for operand category &2

What causes this issue?

Update type &V1& is not possible for output operands of category &V2&.

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?

An internal error has occurred; contact SAP.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AH791 - Update type &1 not permitted for operand category &2 ?

  The SAP error message AH791 indicates that there is an issue with the update type specified for a particular operand category in a data processing or update operation. This error typically arises in the context of SAP's data processing, especially when dealing with update rules in the context of data warehousing or reporting.
  Cause:
  The error message "AH791 Update type &1 not permitted for operand category &2" generally occurs due to one of the following reasons:
  
  
  Incompatible Update Type: The update type specified (e.g., 'Insert', 'Update', 'Delete') is not allowed for the operand category being used. Each operand category has specific rules regarding which update types are permissible.
  
  
  Configuration Issues: There may be a misconfiguration in the data model or the update rules that define how data should be processed.
  
  
  Data Source Issues: The data source from which the data is being pulled may not support the specified update type for the given operand category.
  
  
  Solution:
  To resolve the AH791 error, you can take the following steps:
  
  
  Check Update Type: Review the update type specified in your data processing logic. Ensure that it is compatible with the operand category you are working with. Refer to the SAP documentation for the specific operand categories and their allowed update types.
  
  
  Review Configuration: Check the configuration settings in your data model or update rules. Make sure that the settings align with the requirements of the operand category.
  
  
  Adjust Data Source: If the issue is related to the data source, verify that the data source supports the update type you are trying to use. You may need to adjust the data source or the way data is being extracted.
  
  
  Consult Documentation: Refer to the SAP Help Portal or relevant documentation for detailed information on operand categories and their associated update types.
  
  
  Testing: After making changes, test the data processing operation again to ensure that the error has been resolved.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Transaction Codes: Familiarize yourself with transaction codes related to data modeling and update rules, such as RSA1 (Data Warehousing Workbench) or other relevant transactions.
  
  By following these steps, you should be able to identify the root cause of the AH791 error and implement a suitable solution.