How to reset a count variable in a conditional format trigger

Question

I am using a conditional format trigger to eliminate sections of a report where there is no data. The trigger is automatically generated by reports (shown below). the condition is :com_count = '0' therefore no record, no display of section - if :com_count>0 then data present and display record.
It works fine eliminating the sections - until actual data is found - and count is set to 1 and it displays the record. The problem is that once :com_count >0, then the section displays throughout the rest of the report whether there is actually data or not.
It seems that :com_count needs to be reset to 0, but when I try to do that, it throws an error stating that :com_count is a read only variable.
I am new to PL/SQL so can anyone suggest how I can reset the :com_count to 0 each time the trigger fires with :com_count = 1?
Any help would be appreciated. Thanks,
Glenn
The conditional format trigger is:
function M_G_COM_RANK_GRPFRFormatTrigge return boolean is
begin
-- Automatically Generated from Report Builder.
if (:COM_COUNT = '0')
then
return (FALSE);
end if;
return (TRUE);
end;
The count
It works perfectly

Answer 1

wher is your COM_COUNT defined?
If should be defined in the datamodel in the "mastergroup" of the "detailgroup" of which you want to count the records.
If you do so, there is a property of the item "Reset at" ( which is by default set to "Report") and you then can change it to the name of the mastergroup. So every time a new record is "active" in the mstergroup, the count-item will be reset to 0.
hope this helps