I have a report that runs fine on v8.5.

I need to convert it to V9 or later.

I have a formula field:

@difference = {#RTEstGrp2}-Sum ({@Actual}, {pc00300.zTaskID})

This works fine in V8.5 - when opening report in V9 - I get.........

a summary has been specified on a non-recurring field. Details: @difference

I am suppressing the detail section and displaying sum totals for the records and subtracting estmates - actuals to equal difference.....

Any guidance would be appreciated......