The graph cannot be produced at this time

[toreba]

Hi,

I have a batch process exporting several hundred charts to PNG format via TQRChart and TgtQRExportInterface from Gnostice.

I am using:
- TChart Pro v2019.27.190530 32-bit VCL;
- QuickReport Pro v6;
- Gnostice eDocEngine 5.0.0.500 Pro;
- Delphi 10.3.1

After producing about 800 PNG files, the process crashes with the error message 'The graph cannot be produced at this time' in a dialog box captioned simply 'Error'. This error message is not originating in my code, and the wording suggests that it's coming from TChart or TQRChart. Is this correct?

Any ideas what is provoking this error?

Regards

Toreba

[Yeray]

Hello Toreba,

I can't find that error string ("The graph cannot be produced at this time") in TeeChart sources, so I've tried to reproduce the problem in a simple example without success.
I've been able to generate 1000 png charts with the attached application keeping the memory below 4MB for that process.

MultiPNGCharts_2022-04-27_10-50-30.png (4.52 KiB) Viewed 8061 times

MultiPNGCharts.zip

(2.14 KiB) Downloaded 601 times

[toreba]

Hi Yeray,

Thanks for checking. Do your sources include TQRChart, or do those components belong to QBS?

I agree with you that memory leakage does not seem to be a problem, nor does number of points per graph.

I will investigate further by eliminating successively the Gnostice and QuickReport components and see whether that helps isolate the problem.

Regards

Toreba

[Yeray]

Hello Toreba,

We maintain the sources of TQRChart, but this integration basically generates a bitmap from a TChart. So when the problem is in TeeChart, in general we can isolate bugs without QuickReport pretty easily.

[toreba]

Hi Yeray,

Did your search for the error message text include the TQRChart sources?

Regards

Toreba

[Yeray]

Hello Toreba,

Did your search for the error message text include the TQRChart sources?

Yes, I did without any match.

[toreba]

Thank you Yeray.

If I discover anything myself, l post here again.

Regards

Toreba