How To Fix K8020 - An overflow occurred during calculation of output

SAP Error Message - Details

• Message type: E = Error

• Message class: K8 - CO Planning: Messages for Function Group KAPP

• Message number: 020

• Message text: An overflow occurred during calculation of output

What causes this issue?

You used <ZH>Activity -> Output</> to calculate the plan output from
plan activities with the help of the output factor.
During the calculation, the combination
&V1&
&V2&
resulted in an overflow in period &V3&. The results would no longer fit
in the affected databank field.

System Response

Processing is terminated

How to fix this error?

Revise your entries, or avoid executing the function for this
combination.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message K8020 - An overflow occurred during calculation of output ?

  The SAP error message K8020, which states "An overflow occurred during calculation of output," typically occurs in the context of cost accounting or controlling modules when the system attempts to perform a calculation that exceeds the maximum limit for a numeric field. This can happen in various scenarios, such as during the execution of cost center accounting, internal orders, or when processing allocations.
  Causes:
  
  Data Type Limitations: The error often arises when the result of a calculation exceeds the maximum value that can be stored in the data type used (e.g., integer, decimal).
  Incorrect Configuration: Misconfiguration in the settings for cost elements, cost centers, or internal orders can lead to unexpected calculations.
  Large Values: Input data that contains unusually large values or a high volume of transactions can trigger this overflow.
  Custom Code: If there are custom ABAP programs or enhancements that perform calculations, they may not handle large values correctly.
  
  Solutions:
  
  Review Input Data: Check the input data for any unusually large values that may be causing the overflow. Ensure that the data being processed is within reasonable limits.
  Adjust Configuration: Review the configuration settings in the controlling module to ensure they are set up correctly. This includes checking cost elements, cost centers, and any allocation methods.
  Check Custom Code: If there are any custom ABAP programs or enhancements, review the code to ensure that it properly handles large values and does not lead to overflow conditions.
  Increase Data Type Size: If feasible, consider changing the data type used in calculations to a larger type that can accommodate larger values (e.g., from integer to long integer).
  SAP Notes: Check for any relevant SAP Notes that may address this specific error. SAP frequently releases updates and patches that can resolve known issues.
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like KSB1 (Cost Centers: Actual Line Items) or KOB1 (Orders: Actual Line Items) to analyze the data that is causing the overflow.
  Debugging: If you have access to development tools, you can debug the process to identify the exact point where the overflow occurs.
  SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance. They can provide insights based on the specific version of SAP you are using and any known issues.
  
  By following these steps, you should be able to identify the cause of the K8020 error and implement a solution to resolve it.