How To Fix DPR_SHARED206 - &1 &2: Start constraint conflicts with a successor date

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 206

• Message text: &1 &2: Start constraint conflicts with a successor date

What causes this issue?

When backward scheduling the project element, the system calculated a
start date based on a successor relationship and the duration of the
project element. This start date occurs before the fixed start of the
project element.

System Response

The system ignores the successor relationship and defines the fixed
start date as the calculated start of the project element. The system
calculates the finish date from that point onwards using the duration of
the project element.

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_SHARED206 - &1 &2: Start constraint conflicts with a successor date ?

  The SAP error message DPR_SHARED206 indicates that there is a conflict with the scheduling of tasks in a project, specifically related to start constraints and successor dates. This error typically arises in the context of project management within SAP, particularly when using the Project System (PS) or the Project Management (PM) module.
  Cause:
  The error occurs when:
  
  A task (or activity) has a start constraint that conflicts with the planned start date of its successor task. 
  For example, if a predecessor task is set to start on a specific date due to a constraint, but its successor task is scheduled to start earlier than that date, the system will raise this error.
  
  Solution:
  To resolve the DPR_SHARED206 error, you can take the following steps:
  
  
  Check Task Dependencies:
  
  Review the predecessor and successor relationships between the tasks in your project. Ensure that the successor task does not have a start date that is earlier than the end date of the predecessor task.
  
  
  
  Adjust Start Constraints:
  
  If the predecessor task has a start constraint (e.g., "Must Start On", "Start No Earlier Than"), consider adjusting this constraint to allow for the successor task to start on its planned date.
  
  
  
  Modify Task Dates:
  
  If necessary, adjust the dates of the tasks involved. You may need to delay the start of the successor task to align with the end of the predecessor task.
  
  
  
  Review Project Scheduling Settings:
  
  Check the overall project scheduling settings to ensure that they are configured correctly. This includes reviewing any global settings that might affect task scheduling.
  
  
  
  Use the Scheduling Tool:
  
  Utilize the scheduling tool within SAP to automatically adjust dates based on dependencies and constraints. This can help in resolving conflicts without manual adjustments.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for more detailed guidance on managing task dependencies and constraints.
  
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CJ20N (Project Builder) or CJ02 (Change Project) to view and modify project tasks and their dependencies.
  Project Management Best Practices: Familiarize yourself with best practices in project management to avoid such conflicts in the future, such as proper planning of task dependencies and constraints.
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or solutions related to this error message.
  
  By following these steps, you should be able to identify the source of the conflict and implement a solution to resolve the error.