How To Fix CN234 - Maintain at least one activity data field

CN234 - Overview

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 234

• Message text: Maintain at least one activity data field

What causes this issue?

You want to access a function for a new activity.
The function must exist before the system can carry ou the function for
it. To this end, at least one value in the activity fields must differ
from the default values.

How to fix this error?

Maintain an activity field first, such as the short text. Then carry
out the desired function.

Error message extract from SAP system. Copyright SAP SE.

CN234 - Details

• The SAP error message CN234 ("Maintain at least one activity data field") typically occurs in the context of project management or controlling modules, particularly when working with network activities in SAP. This error indicates that the system requires at least one activity data field to be filled in for a network activity, but none have been provided.
  
  Cause:
  The error is triggered when you attempt to save or process a network activity without entering any of the required activity data fields. These fields may include:
  
  Activity description
  Work center
  Duration
  Start and finish dates
  Control key
  Other relevant fields depending on the configuration of your SAP system
  
  
  Solution:
  To resolve the CN234 error, you should:
  
  
  Check Required Fields: Review the activity data fields in the network activity screen. Ensure that at least one of the required fields is filled in. Commonly required fields include:
  
  Activity type
  Work center
  Duration
  Control key
  
  
  
  Enter Data: Fill in the necessary fields. If you are unsure which fields are mandatory,