Diagnosis
There are two reasons why this trip can not be deleted:
RESET N1
This trip has already been transferred to accounting and can no longerbe deleted due to auditing reasons.
The trip was not processed with the travel calendar.
Trips which have been entered by another entry method can contain datawhich cannot be displayed in the travel calendar. Such trips cantherefore not be deleted in the travel calendar.

Procedure
Check if the trip has already been transferred to accounting.
RESET N1
If the trip has already been transferred, you can not delete it.
If the trip has not been transferred, change to the relevantentry scenario to be able to display all of the trip facts. Then youcan delete the trip.