How To Fix PEP091 - The planned start date for task "&" is in the past

SAP Error Message - Details

• Message type: E = Error

• Message class: PEP - Schedule Manager: Messages

• Message number: 091

• Message text: The planned start date for task "&" is in the past

What causes this issue?

For the selected task execution date, scheduling times for the tasks in
your task list are in the past.

System Response

You cannot schedule the tasks in the task list as the data is not
consistent.

How to fix this error?

Check the relative start times that are stored in your task list. Use
the "Scheduling simulation" function to check the relative start times.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PEP091 - The planned start date for task "&" is in the past ?

  The SAP error message PEP091 indicates that the planned start date for a task is set in the past, which is not allowed in the system. This error typically occurs in project management or production planning scenarios where tasks or activities are scheduled with specific start and end dates.
  Cause:
  
  Incorrect Date Entry: The user may have inadvertently entered a start date that is earlier than the current date.
  Data Migration Issues: If data was migrated from another system, it may have included outdated dates.
  Project Rescheduling: Changes in project timelines that were not updated in the task planning.
  System Configuration: Certain configurations or settings in the project management module may enforce strict date validations.
  
  Solution:
  
  
  Update the Planned Start Date:
  
  Navigate to the task in question and update the planned start date to a future date that is valid.
  Ensure that the new date aligns with the overall project schedule.
  
  
  
  Check for Dependencies:
  
  Review any dependencies or constraints that may affect the task's scheduling. Adjust them if necessary.
  
  
  
  Review Project Timeline:
  
  If the project has been rescheduled, ensure that all related tasks have their dates updated accordingly.
  
  
  
  Data Validation:
  
  If the error arises from data migration, validate the data to ensure that all dates are current and correct.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidelines on managing task dates within your version of SAP.
  
  
  
  User Training:
  
  Provide training for users on how to correctly enter and manage task dates to prevent future occurrences of this error.
  
  
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like CJ20N (Project Builder) or CJ02 (Change Project) to access and modify project tasks.
  SAP Notes: Check for any relevant SAP Notes that may address this error or provide additional context.
  System Settings: Review the configuration settings in the project management module to ensure they align with your organization's project management practices.
  
  By addressing the root cause of the error and ensuring that all task dates are set correctly, you can resolve the PEP091 error and maintain the integrity of your project schedules.