How To Fix KZ306 - System error: Error in function module 'FIRST_DAY_IN_PERIOD_GET'

KZ306 - Overview

• Message type: E = Error

• Message class: KZ - Cost Object Repetitive Mfg / Process Mfg

• Message number: 306

• Message text: System error: Error in function module 'FIRST_DAY_IN_PERIOD_GET'

What causes this issue?

A system error occurred.

How to fix this error?

Please inform your system administrator.

Error message extract from SAP system. Copyright SAP SE.

KZ306 - Details

• The SAP error message KZ306, which states "System error: Error in function module 'FIRST_DAY_IN_PERIOD_GET'," typically indicates that there is an issue with the function module that retrieves the first day of a specified period. This error can arise due to various reasons, including configuration issues, data inconsistencies, or problems with the underlying logic in the function module.
  Possible Causes:
  
  Incorrect Period or Fiscal Year: The period or fiscal year being referenced may not exist or may be incorrectly defined in the system.
  
  Configuration Issues: There may be issues with the configuration of the controlling area, fiscal year variant, or other related settings.
  Data Inconsistencies: There could be inconsistencies in the data that the function module is trying to access, such as missing or corrupted records.
  Authorization Issues: The user executing the function may not have the necessary authorizations to access the required data.
  System Bugs: There may be a bug in the SAP system or the