How To Fix UCS0401 - Task &1: Explicit predecessor &2 is not a technical predecessor

SAP Error Message - Details

• Message type: E = Error

• Message class: UCS0 - Messages for Status Management

• Message number: 401

• Message text: Task &1: Explicit predecessor &2 is not a technical predecessor

What causes this issue?

Technical preceding task relationships between the relevant tasks result
from the Customizing settings of <LS>reclassification</> and <LS>
allocation</> methods.
Example: Task A uses method M and task B uses method N. The target
assignment of method M also occurs in the trigger for method N. As a
result, task A is a technical predecessor of task B.
The function <LS>Check Preceding Task Relationships</> determines the
technical preceding task relationships for <LS>reclassification</> and
<LS>allocation</> tasks and checks the technical preceding task
relationships for consistency against the settings for the explicit
preceding task relationships that you specified in the process view of
the consolidation workbench under the "Consolidation Monitor ->
Preceding Task Relationships" node.
You have specified that task &V2& is an explicit predecessor of task
&V1&. However, task &V2& is <ZH>not</> a technical predecessor of task
&V1&.

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?

Check the settings for the preceding task relationships and, if
necessary, remove task &V2& from the definition of the preceding tasks
for task &V1&.

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 UCS0401 - Task &1: Explicit predecessor &2 is not a technical predecessor ?

  The SAP error message UCS0401 indicates that there is an issue with task dependencies in a project or a network. Specifically, the message states that an explicit predecessor task (task &2) is not recognized as a technical predecessor for the task in question (task &1). This typically occurs in project management scenarios where tasks are linked based on their dependencies.
  
  Cause:
  
  Incorrect Task Linkage: The predecessor task may not be correctly defined or linked to the successor task. This can happen if the predecessor task is not in the same project or network.
  Task Status: The predecessor task may be in a status that does not allow it to be a valid predecessor (e.g., it might be completed, canceled, or not yet started).
  Task Type: The predecessor task may not be of the correct type that allows it to be a predecessor (e.g., it might be a milestone or a non-technical task).
  Data Integrity Issues: