How To Fix UCS0202 - Task &2 cannot precede task &1

SAP Error Message - Details

• Message type: E = Error

• Message class: UCS0 - Messages for Status Management

• Message number: 202

• Message text: Task &2 cannot precede task &1

What causes this issue?

The system requires a mandatory sequence of task categories.
Task &V1& belongs to category &V3&, and the preceding task &V2& belongs
to category &V4&. This sequence of categories is not permitted.

System Response

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

How to fix this error?

Change the preceding task definition.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UCS0202 - Task &2 cannot precede task &1 ?

  The SAP error message UCS0202, which states "Task &2 cannot precede task &1," typically occurs in the context of project management or workflow processes within SAP. This error indicates that there is a dependency or sequencing issue between two tasks in a project or workflow.
  Cause:
  The error arises when the system detects that a task (denoted as &2) is scheduled to start or be executed before another task (denoted as &1) that it is dependent on. This can happen due to:
  
  Incorrect Task Sequencing: The tasks have been scheduled in a way that violates the defined dependencies.
  Missing Dependencies: The dependency relationships between tasks have not been properly defined in the project or workflow.
  Manual Changes: Manual adjustments to task dates or sequences that do not respect the logical order of execution.
  
  Solution:
  To resolve the UCS0202 error, you can take the following steps:
  
  
  Check Task Dependencies:
  
  Review the dependencies between the tasks in the project or workflow. Ensure that task &2 is not set to start before task &1 is completed.
  
  
  
  Adjust Task Scheduling:
  
  Modify the start and finish dates of the tasks to ensure that task &1 is completed before task &2 begins. This may involve rescheduling tasks in the project management tool.
  
  
  
  Review Project Plan:
  
  If you are using a project management module (like SAP PS), check the overall project plan for any inconsistencies in task relationships.
  
  
  
  Consult Documentation:
  
  Refer to the project documentation or workflow design to understand the intended sequence of tasks and make adjustments accordingly.
  
  
  
  Use Transaction Codes:
  
  If applicable, use transaction codes like CJ20N (Project Builder) or CJI3 (Project Actual Line Items) to analyze and modify the project structure.
  
  
  
  Testing:
  
  After making changes, test the workflow or project execution to ensure that the error does not reoccur.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message.
  Documentation: Review SAP Help documentation for project management or workflow management to understand how to properly set up task dependencies.
  User Forums: Engage with SAP community forums or user groups for insights from other users who may have encountered and resolved similar issues.
  
  By following these steps, you should be able to identify the root cause of the UCS0202 error and implement a solution to resolve it.