How To Fix /ISDFPS/FDP421 - Contingent start (&1) cannot be after operative end (&2)

SAP Error Message - Details

• Message type: E = Error

• Message class: /ISDFPS/FDP -

• Message number: 421

• Message text: Contingent start (&1) cannot be after operative end (&2)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /ISDFPS/FDP421 - Contingent start (&1) cannot be after operative end (&2) ?

  The SAP error message /ISDFPS/FDP421 indicates that there is a problem with the scheduling of contingent activities in a project or process. Specifically, the error states that the contingent start date (represented by &1) cannot be after the operative end date (represented by &2). This typically occurs in the context of project management or production planning within SAP.
  
  Cause:
  
  Date Configuration: The contingent start date is set to a date that is later than the operative end date. This can happen due to incorrect data entry or misconfiguration of dates in the project or task settings.
  Project Timeline Issues: The project timeline may not be properly aligned, leading to scheduling conflicts where contingent activities are planned to start after the main activities have ended.
  Dependencies: There may be dependencies or relationships between tasks that have not been correctly defined, causing the system to interpret the dates incorrectly.
  
  
  Solution:
  
  Check Dates: Review the contingent start date and