QCAD.org Forum

Hi all,
I'm trying out the CAM-> Nesting function and found it to worked really well UNTIL I added a tabs on the shape to be nested. QCAD crashes after a period of high CPU load.

I tried with simpler shapes (for instant just a circle) and asked to nest in just 4 such instances. Even this simple test makes QCAD crash if the shapes includes a tab. If I remove the tab QCAD nests correctly without crashing.

Is this a known bug?

P.S. I'm on linux ubuntu 64 bits, QCAD 3.27.9

Thank you

I couldn't immediately reproduce this. Could you please attach your file? Thanks.

Hello Andrew,
thank you for the feedback.
Here's an example file.

Basically if I ask to perform nesting of the circular object with tabs included, QCAD would invariable hang and freeze. If I delete the tabs, nesting works without any issue.


Version:
3.28.2.0 (3.28.2)
Internet:
QCAD.org
Build Date:
Aug 30 2023
Revision:
a8039fc
Qt Version:
5.8.0
Architecture:
x86_64
Compiler:
gcc 4.8.1

Hi,

I can confirm the issue when the selected items to nest contain a TAB.

While writing this answer my browser closed twice and the harddisk is still rambling away.
The nesting attempt was preformed at least 5min. ago.

Regards,
CVH

@andrew could you let us know if this is a difficult bug to fix?

Thank you

newyd_cnc wrote: ↑

Fri Nov 03, 2023 8:19 pm

@andrew could you let us know if this is a difficult bug to fix?

Thank you

I wasn't able to reproduce the problem here yet. It nests just fine. What exact Ubuntu version are you on?

Andrew,

Downloaded and installed the latest trial version: qcadcam-3.28.2-trial-win32-installer.msi

With the provided example: test_nesting.dxf

• Selected the circle and the rightmost TAB.
  Menu CAM .. Nesting
  In the Options Toolbar opted for 4 copies.
  The other options as default: Rotations=1; Sheet Margin=0.1; Margin=0.5; Tolerance=0.001; Alignment=Left-Bottom; Strategy=Hull
  Selected the sheet (red square).
  Acknowledged with a right click (Done).

QCAD crashes after a period of high CPU load, about 2 minutes.
And it seems to be a decent crash, the system is unresponsive for an extended period of time.
Other running apps are unresponsive too or fail altogether when addressed. I was unable to close or kill the QCAD process.
Forced a hard reset and rebooted Windows.


As newyd_cnc initially reported:
Without selecting a TAB all is fine but then you need to add TAB's in a later process, after Nesting.
On the sheet will fit at least 225 such circles and then one would need to add at least 15x15x2+60 TAB's.
A simple task with a uniform item to nest but not straightforward with several irregular shapes, with arbitrary nesting positioning/rotations.

Regards,
CVH

Thanks for the details.

I've added a bug report at:
https://www.qcad.org/rsforum/viewtopic.php?p=42574

The problem should be fixed for the next release.

Thanks Andrew.
Remark that the above link and the Changelog link bring us back to this forum topic.

The link to the (fixed) bug report is:
https://qcad.org/bugtracker/index.php?d ... sk_id=2502

Regards,
CVH

andrew wrote: ↑

Mon Nov 06, 2023 2:32 pm

Thanks for the details.

I've added a bug report at:
https://www.qcad.org/rsforum/viewtopic.php?p=42574

The problem should be fixed for the next release.

Is there any preliminary date for the new release including this bugfix?
Thank you

newyd_cnc wrote: ↑

Fri Dec 01, 2023 10:20 am

Is there any preliminary date for the new release including this bugfix?

Yesterday Andrew has set the open source version to snapshot 3.28.2.6
https://github.com/qcad/qcad/commit/e2c ... 59148fc5bb
A new release is very likely.
Main releases require rigorous testing.
For evaluating purposes you can download the latest snapshot (> 3.28.2.5 if any) from your personal download page.

Regards,
CVH

Version 3.29 ... 3.29.1 is released.
Should be fixed

Regards,
CVH