Desktop keeps freezing about every third or fourth time I change the Data type of a column. It acts as if a modal dialog is up - but there isn't (or it's hidden). The only solution is killing the P...
and again!
Creating a custom column:
Calculated duration between two events in DateTime (output in minutes)
Created a custom colum out of that value (durationminutes / 60)
Changed data type to TIME ... GAME-OVER