How To Fix MN899 - Scales of type &1 cannot be evaluated (interval scales only)

SAP Error Message - Details

• Message type: E = Error

• Message class: MN - Message class for subsequent settlement (Purchasing)

• Message number: 899

• Message text: Scales of type &1 cannot be evaluated (interval scales only)

What causes this issue?

The function module &V2& is only intended for evaluation of condition
records with interval scales (scale type D).
However, the function module was called with a condition record
internal number &V3&) with scale type &V1&. This is not permitted.

System Response

Processing is not possible.

How to fix this error?

Please use function module 'MM_ARRANG_COND_REC_EVALUATION'.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MN899 - Scales of type &1 cannot be evaluated (interval scales only) ?

  The SAP error message MN899 indicates that there is an issue with the evaluation of scales in the context of a specific transaction or process. This error typically arises when the system encounters a scale of type that cannot be evaluated, particularly when it expects an interval scale.
  Cause:
  
  Scale Type Mismatch: The error usually occurs when the system is trying to evaluate a scale that is not of the expected type (interval scale). For example, if the system expects a scale that measures continuous data (like temperature or weight) but receives a nominal or ordinal scale instead, it will trigger this error.
  Configuration Issues: There may be a misconfiguration in the settings related to the scales in the SAP system. This could involve incorrect definitions or settings in the master data or in the configuration of the relevant module.
  Data Entry Errors: Incorrect or incomplete data entries in the relevant fields can also lead to this error. If the data does not conform to the expected format or type, the system will not be able to evaluate it.
  
  Solution:
  
  Check Scale Definitions: Review the definitions of the scales in the system. Ensure that the scales being used are of the correct type (interval scales) and that they are properly configured.
  Review Master Data: Check the master data related to the scales. Ensure that all entries are complete and conform to the expected formats. Look for any discrepancies or errors in the data.
  Configuration Review: If you have access to the configuration settings, review the relevant configuration for the module you are working with. Ensure that all settings related to scales and evaluations are correctly set up.
  Consult Documentation: Refer to SAP documentation or help resources for guidance on the specific transaction or process you are working with. This can provide insights into the expected data formats and configurations.
  Testing: If changes are made, conduct tests to ensure that the error is resolved. Try to replicate the scenario that caused the error to confirm that the solution is effective.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error. SAP Notes often provide solutions or workarounds for known issues.
  Community Forums: Engage with SAP community forums or user groups. Other users may have encountered the same issue 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 guidance based on your specific system configuration and usage.
  
  By following these steps, you should be able to identify the cause of the MN899 error and implement a solution to resolve it.