Conversion to v7 report problem

[liqdgld]

I upgraded my database to v7 from 5.5. It works OK except for an average calculation(which doesn't work) in a report with grouped data and totals. The report is set up to show the number of events per month and gives the total events over the last 7-8 years in the leading grand summary with the average events per month. The subsummary is by Year (leading) and Month (trailing). It worked OK in v5.5 but now the average calculation does not work.

Any help would be appreciated

Arnold