How To Fix V4121 - An invalid weekday was determined in processing IDOC &

SAP Error Message - Details

• Message type: E = Error

• Message class: V4 - Nachrichten Verkauf (Variable Meldungen und EDI-Meldungen)

• Message number: 121

• Message text: An invalid weekday was determined in processing IDOC &

What causes this issue?

You have designated a weekday in the
<DS:GLOS.Intermediate_Document>IDOC</> which cannot be processed.

System Response

The system terminates processing.

How to fix this error?

Correct the value in the IDOC or create the scheduling agreement
manually.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message V4121 - An invalid weekday was determined in processing IDOC & ?

  The SAP error message V4121, which states "An invalid weekday was determined in processing IDOC &," typically occurs during the processing of an IDoc (Intermediate Document) related to sales and distribution (SD) or other modules where date and time calculations are involved. This error indicates that the system has encountered a weekday value that is not valid, which can happen for various reasons.
  Causes:
  
  Invalid Date Format: The date provided in the IDoc may not be in the expected format, leading to an incorrect calculation of the weekday.
  Incorrect Data in IDoc: The IDoc may contain incorrect or unexpected data, such as a date that does not exist (e.g., February 30).
  System Configuration Issues: There may be issues with the configuration of the calendar settings in the SAP system.
  Time Zone Issues: If the IDoc is being processed across different time zones, it may lead to discrepancies in date and time calculations.
  Custom Code or Enhancements: If there are custom programs or enhancements that manipulate date values, they may introduce errors.
  
  Solutions:
  
  Check IDoc Data: Review the IDoc data for any invalid dates or formats. Ensure that all date fields are populated correctly and conform to the expected format.
  Validate Date Logic: If there are custom programs or enhancements, validate the logic used to calculate weekdays and ensure it handles all possible date scenarios correctly.
  Review Configuration: Check the configuration settings related to calendars and date handling in the SAP system. Ensure that the system is set up to handle the expected date ranges and formats.
  Error Handling: Implement error handling in the IDoc processing logic to catch and log invalid dates before they cause processing failures.
  Testing: Conduct thorough testing with various date inputs to ensure that the system can handle edge cases without generating errors.
  
  Related Information:
  
  IDoc Monitoring: Use transaction codes like WE02 or WE05 to monitor IDocs and identify the specific IDoc that triggered the error.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional guidance.
  Documentation: Review SAP documentation related to IDoc processing and date handling to ensure compliance with best practices.
  
  By addressing the root cause of the invalid weekday determination, you can resolve the V4121 error and ensure smooth IDoc processing in your SAP environment.