>>>>I have a report with data grouping.
>>>>How can I count the number of the groups?
>>>>Thank you.
>>>
>>>add a variable to the report, set to count, reset at desired group.
>>
>>I don't want to count the number of records in one group bot the number of different groups in the whole report.
>
>
>I found the solution.
>We have to create two variables N1 and N2 with these parameters:
>
>
> N1 N2
>__________________________________________________________________
>Value to store: 0 iif(N1=1,1,0)
>Initial value: 0 0
>Reset at: "name of the group" End of Report
>Calculate: Count Sum
>__________________________________________________________________
>
>Variable N2 is what we need.
>
>
>Interesting, isn't it.

And check Vlad Tatavu's solution using a public variable, too, from earlier in the thread.