How To Fix UCS0226 - Task &1 must be behind task &2

SAP Error Message - Details

• Message type: E = Error

• Message class: UCS0 - Messages for Status Management

• Message number: 226

• Message text: Task &1 must be behind task &2

What causes this issue?

Task &V2& is executed by consolidation unit; copy task &V1& is executed
by consolidation group. A copy task that is run per consolidation group
needs to be assorted after the last task that is run per consolidation
unit. However, task &V1& is located prior to task &V2&.

System Response

The task sequence cannot be saved.

How to fix this error?

Correct the task sequence.

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 UCS0226 - Task &1 must be behind task &2 ?

  The SAP error message UCS0226, which states "Task &1 must be behind task &2," typically occurs in the context of task sequencing in a project or workflow. This error indicates that there is a dependency between two tasks, where task &1 is incorrectly scheduled to occur before task &2, which is not allowed based on the defined dependencies.
  Cause:
  The error is caused by a violation of the task dependency rules in the project or workflow. Specifically, it means that the system has detected that task &1 is set to start or finish before task &2, even though task &2 is a prerequisite for task &1. This can happen due to:
  
  Incorrect task scheduling.
  Manual changes to task dates that do not respect the defined dependencies.
  Changes in the project structure that were not properly updated in the task dependencies.
  
  Solution:
  To resolve the UCS0226 error, you can take the following steps:
  
  
  Check Task Dependencies: Review the dependencies between the tasks in your project. Ensure that task &1 is correctly set to follow task &2. You can do this by navigating to the project management or workflow management module in SAP.
  
  
  Adjust Task Dates: If task &1 is incorrectly scheduled, adjust its start and finish dates to ensure it occurs after task &2. This may involve rescheduling or reassigning resources.
  
  
  Update Project Structure: If there have been recent changes to the project structure, ensure that all dependencies are updated accordingly. This may involve re-evaluating the entire task sequence.
  
  
  Consult Documentation: Refer to the SAP documentation or help resources for specific guidance on managing task dependencies in your version of SAP.
  
  
  Test Changes: After making adjustments, test the changes to ensure that the error is resolved and that the project can proceed without further issues.
  
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like CJ20N (Project Builder) or CJ02 (Change Project) to view and modify project tasks and dependencies.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  User Roles: Ensure that you have the necessary permissions to modify project tasks and dependencies, as restrictions may prevent you from making changes.
  
  By following these steps, you should be able to resolve the UCS0226 error and ensure that your project tasks are sequenced correctly.