How To Fix 28121 - Table/function does not allow inference of values

SAP Error Message - Details

• Message type: E = Error

• Message class: 28 - Configuration

• Message number: 121

• Message text: Table/function does not allow inference of values

What causes this issue?

If a table/function in an action is not in the conditional part of an
action (after IF), the table/function is used to infer values.
The syntax check recognizes an error if such a table/function does not
allow inference of values.

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?

Check whether the inference of values is possible.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 28121 - Table/function does not allow inference of values ?

  The SAP error message 28121, "Table/function does not allow inference of values," typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA when there is an issue with data modeling, particularly when trying to infer values from a table or function that does not support this operation.
  Cause:
  
  Data Model Configuration: The error often arises when the data model is not properly configured to allow for value inference. This can happen if the table or function does not have the necessary relationships or keys defined.
  Missing or Incorrect Relationships: If the relationships between tables are not correctly defined, the system may not be able to infer values from one table to another.
  Function Limitations: Some functions or tables may have restrictions that prevent them from being used for value inference, either due to their design or the way they are being called.
  Data Integrity Issues: If there are inconsistencies or missing data in the tables involved, the inference process may fail.
  
  Solution:
  
  Check Data Model: Review the data model to ensure that all necessary relationships and keys are correctly defined. Make sure that the tables involved are properly linked.
  Review Table/Function Properties: Check the properties of the table or function to ensure that it is configured to allow for value inference. This may involve adjusting settings in the data model or the specific table/function.
  Data Quality Check: Ensure that the data in the tables is complete and consistent. Look for any missing values or discrepancies that could be causing the inference to fail.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on the table or function you are working with. There may be known limitations or specific configurations required.
  Debugging: If you have access to debugging tools, you can trace the execution to identify where the inference is failing and gather more context about the error.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions to common problems.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed. Other users may have encountered the same error and can provide insights or solutions.
  SAP Support: If the issue persists and you are unable to resolve it, consider reaching out to SAP Support for assistance. They can provide more detailed analysis and support based on your specific system configuration.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.