I am using Crystal 11.  I need the most recent data for a particular data item.  This would apply to the entire report and I would need to sum just the most recent data.  There are multiple historical records per data item.  I've created a formula "maximum({datefield})" and tried to use in in my group or selection formula, but I keep getting  the message "a boolean is required here".  I've tried writing "maximum({datefield})" directly in the selection formula and get the message "A funtion cannot be used because it must be evaluated later".  How can I return the most recent data and be able to sum on it?

Edited by lohme - 13 Nov 2009 at 10:54am

Thanks - I'll give that a try.