How To Fix DPR_SHARED242 - &1 &2: Constraint conflicts with predecessor/successor (&3 &4)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 242

• Message text: &1 &2: Constraint conflicts with predecessor/successor (&3 &4)

What causes this issue?

You have either set a start constraint for the task &V1& &V2& and the
constraint date conflicts with the predecessor relationship for &V3&
&V4& or you have set a finish constraint for the task &V1& &V2& and the
constraint date conflicts with the successor relationship for &V3& &V4&.
The start or finish constraint date reduces the lag that is defined
between this task and the corresponding predecessor or successor task.
This is not permitted.
Therefore, there is a <ZH>scheduling conflict</>; the system cannot take
the influence of the relationship into account in scheduling.

System Response

The constraint is reduced.

How to fix this error?

Check the data of the predecessor or successor relationships for &V3&
&V4& and the start or finish constraint for task &V1& &V2&.

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_SHARED242 - &1 &2: Constraint conflicts with predecessor/successor (&3 &4) ?

  The SAP error message DPR_SHARED242 indicates that there is a constraint conflict in a project or task scheduling scenario. 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. The error message provides information about the conflicting predecessor or successor relationships between tasks.
  Cause:
  The error message DPR_SHARED242 is triggered when:
  
  Constraint Conflicts: There are conflicting constraints set on a task that prevent it from being scheduled correctly in relation to its predecessor or successor tasks. For example, if a task is set to start on a specific date but its predecessor is scheduled to finish later than that date, a conflict arises.
  Incorrect Task Relationships: The relationships (dependencies) between tasks may not be correctly defined, leading to scheduling issues.
  Resource Availability: If resources assigned to tasks are not available during the scheduled time, it can also lead to conflicts.
  Calendar Issues: If the project calendar or working times are not aligned with the task schedules, it can cause conflicts.
  
  Solution:
  To resolve the DPR_SHARED242 error, you can take the following steps:
  
  
  Check Task Constraints:
  
  Review the constraints set on the tasks involved. Ensure that they are logical and do not conflict with the predecessor or successor tasks.
  Adjust the constraints if necessary (e.g., change from "Must Start On" to "Start No Earlier Than").
  
  
  
  Review Task Relationships:
  
  Verify the predecessor and successor relationships between tasks. Ensure that they are correctly defined and that the scheduling logic makes sense.
  If necessary, modify the relationships to eliminate conflicts.
  
  
  
  Resource Allocation:
  
  Check the availability of resources assigned to the tasks. Ensure that resources are available during the scheduled time.
  If resources are not available, consider rescheduling tasks or reallocating resources.
  
  
  
  Project Calendar:
  
  Review the project calendar settings to ensure that they align with the working times of the tasks.
  Adjust the calendar settings if there are discrepancies.
  
  
  
  Re-schedule the Project:
  
  After making the necessary adjustments, re-schedule the project to see if the error persists.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for more detailed guidance on managing task constraints and dependencies.
  
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CJ20N (Project Builder) or CProject (Project Management) to view and edit project tasks and their relationships.
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to this error message.
  User Forums: Consider visiting SAP community forums or user groups for additional insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the constraint conflicts indicated by the DPR_SHARED242 error message.