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

SAP Error Message - Details

• 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message KZ306 - System error: Error in function module 'FIRST_DAY_IN_PERIOD_GET' ?

  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 specific version you are using that affects the function module.
  
  Solutions:
  
  
  Check Period and Fiscal Year:
  
  Verify that the period and fiscal year you are trying to access are correctly defined in the system.
  Use transaction codes like OB52 (for period control) to check the settings.
  
  
  
  Review Configuration:
  
  Ensure that the controlling area and fiscal year variant are correctly configured.
  Check the settings in transaction code OKEQ (for controlling area settings) and OBA7 (for fiscal year variant).
  
  
  
  Data Consistency Check:
  
  Run consistency checks on the relevant data to identify any inconsistencies.
  Use transaction codes like KAH1 or KAH2 to check for any issues in the master data.
  
  
  
  Authorization Check:
  
  Ensure that the user has the necessary authorizations to execute the function module and access the required data.
  Check the user roles and authorizations in transaction code SU01.
  
  
  
  Debugging:
  
  If you have access to debugging tools, you can debug the function module to identify the exact point of failure.
  Use transaction SE37 to analyze the function module and see if you can replicate the issue.
  
  
  
  SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error.
  Search for known issues or patches related to the function module FIRST_DAY_IN_PERIOD_GET.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as OB52, OKEQ, and SU01 for configuration and authorization checks.
  SAP Documentation: Review SAP documentation related to controlling and fiscal year settings for a deeper understanding of the configuration.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed.
  
  By following these steps, you should be able to diagnose and resolve the KZ306 error in your SAP system.