How To Fix CN350 - You cannot change the activity type

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 350

• Message text: You cannot change the activity type

What causes this issue?

You want to replace an activity with a subnetwork. In Customizing the
activity has been given a particular control key, that also implies
which activity category it is. This activity category is not the same
as the category of the activity to be replaced. You are not permitted
to change the activity category.

System Response

INCLUDE NA_ALLG_NOVERARBEITUNG OBJECT DOKU ID TX

How to fix this error?

Check the Customizing settings and the activity to be replaced. If
necessary, maintain a valid control key in Customizing by choosing
<DS:SIMG.SIMG_OLPR_TLNTZOPTP>Define Parameters for Subnetworks </>

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN350 - You cannot change the activity type ?

  The SAP error message CN350, which states "You cannot change the activity type," typically occurs in the context of controlling (CO) when trying to change the activity type of a cost center or internal order that is already assigned to a particular activity type. This error can arise due to various reasons, including system settings, data integrity constraints, or business rules.
  Causes:
  
  Activity Type Assignment: The activity type is already assigned to a cost center or internal order, and the system does not allow changes to the activity type once it has been assigned.
  Status of the Cost Object: The cost center or internal order may be in a status that does not permit changes (e.g., it is already posted to).
  Authorization Issues: The user may not have the necessary authorizations to make changes to the activity type.
  Configuration Settings: Certain configuration settings in the controlling module may restrict changes to activity types.
  
  Solutions:
  
  Check Assignment: Verify