TppSubReport & Preview : AV

rbuser

I just installed RB7 Enterprise for D6 Prof.

When I run Demo '3. EndUser', '5. Dynamic SubReport Loading' and try to
preview the report I get an Access Violation.

Any fixes or workarounds ?

Thanks,

Samuel

digitalmetaphors

The detail band engine was getting freed for which the subreport was relying
on. Since the dynamic subreport loading technique in this demo loads the
template after the engine begins generating, you need to reset the
subreport's report's engine after loading the template.

procedure TmyDynamicLoadingSubReport.LoadSubreport;
begin

if (Band is TppTitleBand) then
LoadTitleSubreport

else if (Band is TppHeaderBand) then
LoadHeaderSubreport

else if (Band is TppFooterBand) then
LoadFooterSubreport;

Report.Engine.Reset;

end;


Cheers,

Jim Bennett
Digital Metaphors

rbuser

Almost, the problem still exists if you first go to Preview, then change
something in the design tab and then go back to the Preview.

Samuel.

digitalmetaphors

The engine is not going to let us get away with resetting it once. We need
to tell it that it hasn't been initialized because we just loaded a template
without it knowing it.

Instead of Report.Engine.Reset, call these two lines of code in its place in
TmyDynamicLoadingSubReport.LoadSubreport after the tempalte is loaded:

Report.Engine.State := Report.Engine.State - [esInitialized];
Init;



Cheers,

Jim Bennett
Digital Metaphors

rbuser

Thanks Jim, that works fine now !