How To Fix K6661 - Error while determining the period assignment in planning.

K6661 - Overview

• Message type: E = Error

• Message class: K6 - EC-EIS/EC-BP data basis: Data entry and collection

• Message number: 661

• Message text: Error while determining the period assignment in planning.

What causes this issue?

An error occurred while determining and assigning time periods in
planning.

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 the entry of periods on the initial screen.
A different number of periods between the source and target areas is
permitted only in the forecast. Check the fiscal year variant of the
aspects.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message K6661 - Error while determining the period assignment in planning. ?

  The SAP error message K6661, "Error while determining the period assignment in planning," typically occurs in the context of SAP Controlling (CO) when there is an issue with the configuration or data related to period assignments in planning scenarios. This error can arise during various planning activities, such as when executing planning functions or running planning reports.
  Causes of Error K6661
  
  
  Missing or Incorrect Configuration: The period assignment configuration may not be set up correctly in the system. This includes settings related to fiscal year variants, periods, and planning versions.
  
  
  Inconsistent Data: There may be inconsistencies in the master data or planning data that prevent the system from determining the correct period assignment.
  
  
  Invalid Planning Version: The planning version being used may not be valid or may not have been properly defined in the system.
  
  
  Fiscal Year Variant Issues: The fiscal year variant assigned to the controlling area or the company code may not align