How To Fix 5D379 - Last day of month for & could not be determined

SAP Error Message - Details

• Message type: E = Error

• Message class: 5D - Error Messages for German Infotype Module Pools

• Message number: 379

• Message text: Last day of month for & could not be determined

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message 5D379 - Last day of month for & could not be determined ?

  The SAP error message 5D379 ("Last day of month for & could not be determined") typically occurs in the context of date calculations, particularly when the system is unable to determine the last day of a specified month for a given date. This can happen for various reasons, such as incorrect date formats, missing configuration, or issues with the calendar settings in the system.
  Causes:
  
  Invalid Date Input: The date provided may be in an incorrect format or may not correspond to a valid date.
  Calendar Settings: The fiscal calendar or factory calendar may not be properly configured, leading to issues in determining month-end dates.
  Leap Year Issues: If the month in question is February, and the year is a leap year, the system may struggle to determine the last day if not configured correctly.
  Missing Data: There may be missing entries in the relevant tables that define month-end dates or fiscal periods.
  
  Solutions:
  
  Check Date Format: Ensure that the date being processed is in the correct format (e.g., YYYY-MM-DD) and is a valid date.
  Review Calendar Configuration: 
  
  Go to the transaction code OB29 to check the fiscal year variant settings.
  Ensure that the factory calendar is correctly defined in SCAL (Define Calendar).
  
  
  Verify Leap Year Handling: If the issue is related to February, ensure that the system correctly recognizes leap years.
  Check for Missing Entries: Look into the relevant tables (like T005 for country-specific settings) to ensure that all necessary entries are present.
  Debugging: If you have access to debugging tools, you can trace the program to see where the error is being triggered and gather more context about the input data.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. You can search for the error number in the SAP Support Portal.
  Documentation: Review SAP documentation related to date handling and fiscal year settings for more insights.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or functional team for further investigation.