Crystal Reports is infuriating at times. ARGH. I am trying to insert a field into a report which has grouped data, and have a SUM of the field for each grouping... I can work out how to insert the Maximum of the group. The minimum, the count. The n'th smalled. I can sum the minimums if I need... But I cannot work out how to just sum. ARGH!

p.s. I just found the FORMULAS area... and defined Sum ({StartStop.JourneyTime} ) but this brings up an error... More ARGH!