Yade

Periodicity is broken

Asked by Paola

Hi all!

I have recently installed Ubuntu 14.04 on my laptop and followed the instructions to install yade. My scritp is simulating an avalanche with the ParticleFlowEngine. At first the sample is compacted (that works well) and after an inclined gravity is imposed and the particles should start to move and I am able to calculate all the stresses, pore pressure and volumefractions. I have run my script, which was running smoothling with Ubuntu 12.04 and yadedaily, and I received the following error:

Welcome to Yade 1.12.0-104-dd1f842~trusty
TCP python prompt on localhost:9000, auth cookie `kssycu'
XMLRPC info provider on http://localhost:21000
Running script avalanches.py
CompactionDone
Set up complete
2.69457103478
[[ ^L clears screen, ^U kills line. F12 controller, F11 3d view (use h-key for showing help), F10 both, F9 generator, F8 plot. ]]

Yade [1]: periodicity is broken
617 0 854 790 vs. 1 31 323 614
periodicity is broken
617 0 854 790 vs. 1 31 323 614
periodicity is broken
617 0 854 790 vs. 1 31 323 614
periodicity is broken
617 0 854 790 vs. 1 31 323 614
periodicity is broken
451 0 313 183 vs. 870 431 1 628
periodicity is broken
451 0 313 183 vs. 870 431 1 628
....
periodicity is broken
274 0 910 191 vs. 1 172 668 213
periodicity is broken
274 0 910 191 vs. 1 172 668 213
periodicity is broken
274 0 910 191 vs. 1 172 668 213
periodicity is broken
910 0 617 929 vs. 1 576 341 114
periodicity is broken
910 0 617 929 vs. 1 576 341 114
periodicity is broken
910 0 617 929 vs. 1 576 341 114
periodicity is broken
910 0 617 929 vs. 1 576 341 114
*** Error in `/usr/bin/python': double free or corruption (!prev): 0x00007f78b34e4e60 ***
Aborted (core dumped)

I am using the PeriodicFlowEngine and I believe there is something that is going wrong there, but I don-t understand what it is. Basically after the first part that says Set up complete, there are these lines of periodicity is broken that come up very fast and after a couple of second the program is aborted.

Do you have any idea?

Thank you

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Chareyre (bruno-chareyre-9) said : 		#1

Hello Paola!
First, did you compare the same version of yadedaily on 12.04 and 14.04?
Second, remember my private email regarding changes in therm of
permeability. It could be that the current (and correct) permeability is
such that with the same timestep as before the integration is now unstable.
Try dividing permeabilityFactor by 1000 and see if it is better.
Cheers
Bruno

Revision history for this message
Paola (tanghisha) said : 		#2

Thank you Bruno.
I didn't have the chance to compare the same version as I didn't have the old laptop I was running yadedaily with ubuntu 12.04 anymore.
I did what you suggested me, but not much has changed except for the last line which now is

periodicity is broken
910 0 617 929 vs. 1 576 341 114
periodicity is broken
910 0 617 929 vs. 1 576 341 114
periodicity is broken
910 0 617 929 vs. 1 576 341 114
periodicity is broken
910 0 617 929 vs. 1 576 341 114
*** Error in `/usr/bin/python': free(): invalid next size (normal): 0x00007f1ebb4e4e60 ***
Aborted (core dumped)

So I really don't know what to do next.

Cheers

Paola

Revision history for this message
Bruno Chareyre (bruno-chareyre) said : 		#3

Can you please send an example script showing the problem to my personnal adress?

Can you help with this problem?

Provide an answer of your own, or ask Paola for more information if necessary.

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