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1.9.0 Beta (r12739) can't simulate the multibody 3D robot example

#2814  Permalink Top

1.9.0 Beta (r12739) can't simulate the multibody 3D robot example

Oct-15-12 16:13:40

I just installed 1.9.0 beta and opened the \Mechanics\MultiBody\Systems\RobotR3 example and then selected Simulate from the Simulate menu. On the first attempt the compile never completed (ran for a few hours). After shutting down and restarting it did compile but then the simulation never completed (ran for about an hour).

I'm on a 64-bit Windows 7 Professional Service Pack 1 machine with 8GB RAM and an i7-2760QM CPU.

#2815  Permalink Top

Re: 1.9.0 Beta (r12739) can't simulate the multibody 3D robot example

Oct-15-12 16:19:07

Hi,

Use the latest nightly build:
https://build.openmodelica.org/omc/buil … ly-builds/

Cheers,
Adrian Pop/

#2816  Permalink Top

Re: 1.9.0 Beta (r12739) can't simulate the multibody 3D robot example

Oct-15-12 18:39:19

Hi Adrian.

FYI: I just uninstalled r12739 and installed today's r13381. It compiles on first try but the simulation has now run for well over 60 minutes with no sign of stopping... Seems like there is a problem.

Joe

#2817  Permalink Top

Re: 1.9.0 Beta (r12739) can't simulate the multibody 3D robot example

Oct-15-12 19:02:51

Hi,

What version of the Modelica library are you using? The default 3.1 or 3.2.1?

Cheers,
Adrian Pop/

#2818  Permalink Top

Re: 1.9.0 Beta (r12739) can't simulate the multibody 3D robot example

Oct-15-12 19:15:56

I'm completely new to OM (and Modelica in general) so bear with me.

I'm using the OM Connection Editor. According to TOOLS -> OPTIONS -> LIBRARIES I'm using the 'default' Modelica and default ModelicaReference. If I look under the COMPONENTS -> MODELICA -> USERSGUIDE -> RELEASENOTES, I see a 'version_3_1' and 'Version_3_1_BugFixes'. No version 3.2.1 though. If I wanted to switch to "Version_3_1_BugFixes" do I use this string in the TOOLS -> OPTIONS -> LIBRARIES dialog?

Joe

#2819  Permalink Top

Re: 1.9.0 Beta (r12739) can't simulate the multibody 3D robot example

Oct-15-12 19:24:25

Hi,

No it should be OK. I thought this model was working, but it seems I was wrong.
I had a look in our testsuite and we don't seem to test for that particular model only for oneAxis:
https://test.openmodelica.org/hudson/jo … ies_msl31/
It seems to be a bug and there is an infinite loop. I'll add a bug report about it.

Cheers,
Adrian Pop/

#2820  Permalink Top

Re: 1.9.0 Beta (r12739) can't simulate the multibody 3D robot example

Oct-15-12 20:09:04

Hi,

I actually reported this bug a while back:
https://trac.openmodelica.org/OpenModelica/ticket/1664
Should be fixed in the next weeks.

Cheers,
Adrian Pop/

#2821  Permalink Top

Re: 1.9.0 Beta (r12739) can't simulate the multibody 3D robot example

Oct-15-12 20:10:46

Thanks Adrian.

#2823  Permalink Top

Re: 1.9.0 Beta (r12739) can't simulate the multibody 3D robot example

Oct-16-12 16:29:03

Hum... seems this bug has been around for a while (not just in the 1.9.0 branch).  I just downloaded the released 1.8.1 and it behaves the same. As Adrian mentioned, seems like this shipping example needs to be added to the automated test suite.

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