Application Errors

rbuser

I have a report where I am displaying 10 DBChart components. All of these
charts are connected to different datasources. The actual report is not
connected to a datasource. I am using RB 7.02 and TeeChart 6.01. Each chart
is connected to it's own query. The report previews just fine, but when I
go to exit the application, I get Application Errors - saying that I'm
referencing invalid memory locations. 9 of the charts are part of the
detail section of the report, with the final chart being part of the Footer
section. If I remove 3 charts so that the report fits on one page, no
problems. I've tried putting all 9 reports into the detail section with no
success. Then I tried using a "section" style subreport with the final 3
charts on that, but I still get the errors. I've tried using ppReport1.Stop
on the AfterPrint event or on the PreviewFormClose event, but still no
success. Do you have any ideas as to how I can solve this issue?

nicocizik

Hi Gary,

ReportBuilder 7.02 is not compatable with TeeChart 6 or higher. Please
upgrade to RB 7.03 and test with that. If you already own 7.02, the upgrade
is free of charge. Contact sales@digital-metaphors.com with your serial
number and purchase name for more information.

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rbuser

I followed your instructions and upgraded to RB 7.03 and that didn't help
anything. I only get these errors when I close the application. The
application itself is just the report with the charts on them. I continue
to get errors when I close Delphi. I don't have any data pipelines assigned
to the subreport or the main report. I have 10 data pipelines assigned to
each respective DBChart component. It seems like the errors are happening
when the application goes to destroy or free the report component.

nicocizik

Gary,

How are you connecting the charts to the datasets? Unfortunately, the
ReportBuilder Teechart components will only work correctly when connected
directly to a TppDataPipeline. If you are connecting some of your charts to
another series, you may be experiencing a destroy bug in TeeChart. This
issue has been an ongoing problem with TeeChart that we notified the TeeMach
guys about well over three years ago. They have yet to address the problem
as it does not affect their immediate product. As an alternative, you could
try creating the charts outside ReportBuilder, save them down as images and
import the images to the report. We have many customers use this method to
work around the limitations of using TeeChart with ReportBuilder.

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rbuser

Thanks for the quick response Nico. I am connecting all 10 charts to their
own TppDBPipeline. None of the charts are linked to one another. I fooled
around with the method you suggested of importing images to Report Builder.
I gave up when I found that I couldn't save an image unless the actual chart
was visible on a form. Maybe I didn't investigate it enough. Can you tell
me how to create a TChart image without the chart being visible? For
example, I will eventually want this report I'm trying to create to be on a
web server - using the web tier approach. Is there a way I can create chart
images off-screen and just import the image to RB Server?

Thanks.

nicocizik

Hi Gary,

Although I am definitely not an expert on the best way to implement
TeeChart. You could place a TeeChart on a form with its Visibility set to
False. Then using the Chart.TeeCreateMetaFile method, you could save the
MetaFile vector image of the teechart and then assign it to the
TppImage.Picture.Graphic property in a Report. This way you will only see
the chart in the report.

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rbuser

Well, I've tried the approach you suggested using the
Chart.TeeCreateMetaFile method and assigning the image to the
TppImage.Picture.Graphic property and that works, but only if the actual
DBChart is visible (the property) AND part of the chart is viewable on the
form. If the form is sized so that the chart doesn't show, no image.
In any case, I started recompiling the TeeChart packages that come with
Report Builder. I'm following the instructions in the TeeChart help file
(under Report Builder). When I try to recompile the dclRBC77.dpk, I get an
error in the ppChReg.pas unit saying that it can't find the DesignIntf.dcu.
That file exists in my Delphi7\Source\ToolsAPI directory, so I added that to
my library path and now I get an error in the DesignEditors.pas unit saying
it can't find Proxies.dcu. The only Proxies.dcu file I have on my hard
drive is in my Delphi5\Lib directory dated 8/11/1999. Is my installation
corrupt or what?