How To Fix CNV_OT_APPL_PE028 - Periods not properly defined in ccode &1, see following message

CNV_OT_APPL_PE028 - Overview

• Message type: E = Error

• Message class: CNV_OT_APPL_PE - Messages for application specific functions

• Message number: 028

• Message text: Periods not properly defined in ccode &1, see following message

Self-Explanatory Message

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CNV_OT_APPL_PE028 - Details

• The SAP error message CNV_OT_APPL_PE028 indicates that there are issues with the period definitions in a specific company code (ccode) in the system. This error typically arises during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data transfer tools.
  
  Cause:
  The error is usually caused by one of the following reasons:
  
  Missing Period Definitions: The fiscal year variant for the specified company code may not have been properly defined, or the periods for the fiscal year are not set up correctly.
  Incorrect Configuration: There may be inconsistencies in the configuration of the fiscal year variant, such as incorrect start and end dates for periods.
  Inactive Periods: The periods may be inactive or not open for posting, which can lead to this error during data migration.
  Data Migration Issues: If the data being migrated does not align with the defined periods in the target system, this error can occur.
  
  
  Solution:
  To resolve