How To Fix KN198 - Decimal overflow while calculating key figures

SAP Error Message - Details

• Message type: E = Error

• Message class: KN - Reporting for Costing

• Message number: 198

• Message text: Decimal overflow while calculating key figures

What causes this issue?

While calculating key figures, one or more field overflows occurred.
The table fields affected are indicated by "99999.99".

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?

When analyzing the results, watch out for the overflows.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KN198 - Decimal overflow while calculating key figures ?

  The SAP error message KN198, which indicates a "Decimal overflow while calculating key figures," typically occurs in the context of SAP's reporting and analytics modules, particularly when dealing with large datasets or calculations that exceed the defined limits for numeric values.
  Cause:
  
  Large Values: The error often arises when the calculations involve very large numbers that exceed the maximum limit for the data type being used (e.g., a decimal or integer).
  Data Type Limitations: Different data types in SAP have specific limits. For example, a decimal field may have a maximum number of digits that can be stored, and if the result of a calculation exceeds this limit, a decimal overflow occurs.
  Aggregation Issues: When aggregating data (e.g., summing up values), if the intermediate results exceed the allowed range, it can trigger this error.
  Incorrect Configuration: Sometimes, the configuration of key figures or the underlying data model may not be set up to handle the expected range of values.
  
  Solution:
  
  Review Data Values: Check the values being processed to ensure they are within acceptable limits. If necessary, filter out or adjust extreme values.
  Adjust Data Types: If possible, change the data type of the key figures or fields involved in the calculation to a type that can handle larger values (e.g., from a decimal to a larger numeric type).
  Modify Calculations: Break down complex calculations into smaller parts to avoid exceeding limits. This can involve creating intermediate key figures that aggregate data in stages.
  Check Configuration: Review the configuration of the key figures in the data model to ensure they are set up correctly to handle the expected range of data.
  Use Aggregation Functions: If applicable, use aggregation functions that are designed to handle larger datasets or values, which may help in avoiding overflow.
  Consult SAP Notes: Check for any relevant SAP Notes or updates that may address this issue, as there may be patches or recommendations from SAP.
  
  Related Information:
  
  Data Types in SAP: Familiarize yourself with the different data types and their limits in SAP, especially for key figures and measures.
  Performance Considerations: Be aware that large datasets can impact performance, so optimizing queries and calculations can also help mitigate issues.
  Testing: Always test changes in a development or quality assurance environment before applying them to production to ensure that they resolve the issue without introducing new problems.
  
  If the problem persists after trying these solutions, it may be beneficial to consult with your SAP support team or refer to SAP's official documentation for further assistance.