AV After using LoadFromTemplate

rbuser

Dear All,

I remembered an old post describes the problem of an delphi AV when
ppReport.Print is use after ppReport.Template.LoadFromFile is
performed. Now I have similiar problem. Does anyone have any information
on this subject?

Currently, I am using Delphi4+RB6.02

Thanks

michael

digitalmetaphors

It is possible that one of your event handlers is beign reassigned
improperly. You can put break point in all your event handlers to see which
are being executed properly. See the guidelines below for ideas on how to
handle losing event handlers. If the problem persists please send a sample
project that reproduces the problem you are describing to
support@digital-metaphors.com.

--------------------------------------------
Article: Troubleshooting Lost Event Handlers
--------------------------------------------

Let's assume you have created a report in Delphi and assign an event
handlers to the OnPreviewFormCreate event of the report. The event is
generated by Delphi as:

procedure TForm1.ppReport1PreviewFormCreate(Sender: TObject);

You then save the report to an RTM file 'Report1.RTM.' The events are
stored as references only, and so the RTM contains:

object ppReport1: TppReport
.
.
OnPreviewFormCreate = ppReport1PreviewFormCreate
end

You then go on to work on a different report. Saving it with under then
name 'Report2.RTM'. Only this time, before you save the report you change
the report component name to: rptOrders. Delphi automatically updates the
event declaration for OnPreviewFormCreate event to:

procedure TForm1.rptOrdersPreviewFormCreate(Sender: TObject);


You then create two buttons on the form, one to load Report1 and preview,
the other to load Report2 and preview. When you run the app and click
Report1, you an error. This is because the Report1.RTM file contains a
reference to ppReport1PreviewFormCreate, a method which no longer exists (at
least with this name) in the form.

One answer is to load all your rtm files into the report component you will
be using for loading. Fix any errors, reassign any events that get cleared.
This will update your rtms to contain the proper event handler names.

--
Cheers,

Alexander Kramnik
Digital Metaphors