Nesting in presence of Tabs: crash

[newyd_cnc]

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

[andrew]

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

[newyd_cnc]

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

[CVH]

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

[newyd_cnc]

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

Thank you

[andrew]

@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?

[CVH]

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

[andrew]

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.

[CVH]

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

[newyd_cnc]

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

[CVH]

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

[CVH]

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

Regards,
CVH