Template executable and some Demo executables do nothing

[Benjamin Johnson]

Hello,  

I had previously posted a request to get started as I was having import issues. I did not realize that I needed to use cmake to build every project. Now that I have done that, I am able to successfully build both the template projects. However I am having issues with vehicle cosim template...

First, there was an inherited class that had some methods overridden, but when I looked the methods did not exist in the parent class. Once I updated the names to the names in the in parent. I was able to build the project. 

Now the executable file doesn't do anything when I click it. It doesn't even look like it's trying to load, it just does nothing. 

I had this same issue with some of the pre-built demos when I first installed Chrono, but I just assumed it was because I didn't enable every module. However, for the cosim template, I have all modules necessary and I am still having issues. Has anyone ever experienced this? I would have thought if there was an issue I would get an error in the build. I would really like to understand what I am doing wrong so I can start playing around with building my own project. If anyone has any input I would really appreciate it. 

Here is my system info if it helps:

Chrono V 6.0 (built within the last couple weeks)

Ubuntu 22.04

ubuntu is running as a VM on a 2019 Mac Book Pro

Thank you for any insights you all can offer. 

Cheers,

Benjamin

[Benjamin Johnson]

Little update: if I try run the file from the terminal I get this output...

Single wheel cosimulation code must be run on at least 3 ranks!


--------------------------------------------------------------------------
MPI_ABORT was invoked on rank 0 in communicator MPI_COMM_WORLD
with errorcode 1.

NOTE: invoking MPI_ABORT causes Open MPI to kill all MPI processes.
You may or may not see output from other processes, depending on
exactly when Open MPI kills them.

[Radu Serban]

Benjamin,

 

I am confused.  The co-simulation framework was not available in version 6.0!

Please use the latest Chrono code from the ‘main’ branch of the repository.

Let us know if you still encounter issues.

 

--Radu

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[Radu Serban]

Yes, this is an MPI code that must be run with mpiexec.  This example requires 3 ranks (as the error message indicates), so you’ll have to use something like

% mpiexec -np 3 …

 

--Radu

 

From: projec...@googlegroups.com <projec...@googlegroups.com> On Behalf Of Benjamin Johnson
Sent: Sunday, 13 November 2022 23:46
To: ProjectChrono <projec...@googlegroups.com>

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[Benjamin Johnson]

My apologies.

I believe I am actually version 7. I cloned from main about 2 weeks ago.

I will try run with mpiexec as you mention. 

Thank you for your quick reply!

[Benjamin Johnson]

Radu,

That did solve the issue. Thank you!

It is also incredibly slow. Is that just my machine? Or is there anything I can do to speed up the simulations?

Thank you!

Benjamin