How To Fix DPR_SHARED201 - &1 &2: Start constraint conflicts with a predecessor's date

DPR_SHARED201 - Overview

• Message type: E = Error

• Message class: DPR_SHARED - Development Projects: Messages for Shared Objects

• Message number: 201

• Message text: &1 &2: Start constraint conflicts with a predecessor's date

What causes this issue?

A constraint is set for the start of the project element.
During forward scheduling for the project element, the system calculates
a start date from the predecessor relationships. The system compares the
determined start date (earliest start) with the constraint for the start
date. The warning appears if the start date conflicts with the
constraint for the start date.

System Response

The system ignores the predecessor relationship and sets the fixed start
date of the project element as the calculated start.

How to fix this error?

Check whether the fixed start date is realistic.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DPR_SHARED201 - &1 &2: Start constraint conflicts with a predecessor's date ?

  The SAP error message DPR_SHARED201 indicates that there is a conflict with the start date of a task in a project due to a predecessor's date constraint. This typically occurs in the context of project management within SAP, particularly when using the SAP Project System (PS) or SAP Portfolio and Project Management (PPM) modules.
  
  Cause:
  The error arises when:
  
  A task (or activity) has a defined start date that conflicts with the finish date of its predecessor task. 
  The predecessor task has a finish date that is later than the start date of the current task, which violates the logical sequence of task execution.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Task Dependencies:
  
  Review the predecessor and successor relationships between tasks. Ensure that the predecessor task is scheduled to finish before the current task starts.
  
  
  
  Adjust Dates:
  
  Modify the start date of the current task to ensure it starts after the predecessor task has