How To Fix KG339 - The planning period and the reference period cannot overlap

SAP Error Message - Details

• Message type: E = Error

• Message class: KG - CO-PA Planning

• Message number: 339

• Message text: The planning period and the reference period cannot overlap

What causes this issue?

If the plan version for the plan data and reference data is the same,
the two time periods cannot overlap.

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?

Use the function "Change complete plan" if you want to edit a plan
version with certain planning functions (period distribution,
revaluation, valuation).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KG339 - The planning period and the reference period cannot overlap ?

  The SAP error message KG339, "The planning period and the reference period cannot overlap," typically occurs in the context of planning and budgeting within SAP, particularly in modules like SAP Controlling (CO) or SAP Integrated Business Planning (IBP). This error indicates that there is a conflict between the planning period you are trying to use and a reference period that has already been defined.
  Cause:
  The error arises when:
  
  Overlapping Dates: The planning period you are trying to set overlaps with an existing reference period. For example, if your planning period is set from January 1 to March 31, and there is a reference period that also includes any dates within that range, the system will throw this error.
  Incorrect Configuration: The configuration settings for planning periods and reference periods may not be set up correctly, leading to overlaps.
  Data Entry Errors: There may be mistakes in the data entry of the planning or reference periods.
  
  Solution:
  To resolve the KG339 error, you can take the following steps:
  
  
  Check Planning and Reference Periods:
  
  Review the planning period you are trying to use and the reference periods that are already defined in the system.
  Ensure that there are no overlapping dates between the two.
  
  
  
  Adjust Periods:
  
  If there is an overlap, adjust either the planning period or the reference period so that they do not conflict. This may involve changing the start or end dates of one of the periods.
  
  
  
  Review Configuration:
  
  Check the configuration settings in the relevant SAP module to ensure that the planning and reference periods are set up correctly.
  If necessary, consult with your SAP administrator or a functional consultant to verify the settings.
  
  
  
  Data Validation:
  
  Validate the data entries for both planning and reference periods to ensure there are no typographical errors or incorrect date formats.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidelines on managing planning and reference periods in your version of SAP.
  
  
  
  Related Information:
  
  Transaction Codes: Depending on the module you are using, you may need to use specific transaction codes to view or edit planning and reference periods (e.g., KP06 for planning in CO).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Roles: Ensure that you have the necessary permissions to modify planning and reference periods in the system.
  
  If the issue persists after following these steps, it may be beneficial to reach out to SAP support or your internal IT team for further assistance.