Question:

Is it feasible to deactivate the DurationError Veeva message in CRM?

Answer:

On CRM iPad, when the start date is after the end date in Medical Events, the application searches for the DurationError Veeva Message.

If it is deactivated or does not exist, the default message The event end date and time must occur after the start date and time is displayed. This Veeva message is only for defining the text of the error. 

Related Documentation:

CRM Help Documentation: Veeva Messages