How To Fix CPCL110 - Alternative or parallel sequences are not allowed for this task list type

CPCL110 - Overview

• Message type: E = Error

• Message class: CPCL - Service Layer for Plans, Sequences, Operations, and Subober.

• Message number: 110

• Message text: Alternative or parallel sequences are not allowed for this task list type

What causes this issue?

You want to create an alternative or parallel sequence in a task list,
whose task list type disallows it.

System Response

The alternative or parallel sequence was not created.

How to fix this error?

You can no longer change the task list type of a task list that has
already been created. Create a new task list if necessary, whose task
list type allows alternative or parallel sequences. After that create
the alternative or parallel sequence.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CPCL110 - Alternative or parallel sequences are not allowed for this task list type ?

  The SAP error message CPCL110, which states "Alternative or parallel sequences are not allowed for this task list type," typically occurs in the context of production planning and control, particularly when dealing with task lists in SAP's Controlling (CO) or Production Planning (PP) modules.
  
  Cause:
  This error arises when you attempt to create or modify a task list that includes alternative or parallel sequences, which are not permitted for the specific type of task list you are working with. The task list type may have restrictions that do not allow for multiple alternatives or parallel operations, which can happen in various scenarios, such as:
  
  Task List Type Restrictions: Certain task list types (like standard task lists) may not support alternative or parallel sequences.
  Configuration Settings: The configuration settings in the system may restrict the use of alternatives or parallel sequences for the specific task list type.
  Incorrect Data Entry: There may be an error in