How to use local site solver with cosimulation?

I'm trying to run a cosimulation with an A/Car model with Simulink as the master. My A/Car model use some subroutines that is included in our site solver, but the cosimulation use the standard solver. I have tried to use the "User Defined Library Name" when I export my plant, but I still get the same error.

From the msg-file:

---- START: ERROR ----

Error in dispatcher subroutine sfoSUB: Invalid PAR(1): 0800

---- END: ERROR ----

Does anyone have any clue of how I solve this issue?

In the bat-file ctrlsctrl....bat, that is created when I push the run-button in Simulink, there is a row "set MDI_SOLVER_USER_LIB=C:\MSC~1.SOF\ADAMS_~1\2019.2\win64\acar_solver.dll". This points to the standard solver and I guess that it could be a clue of why it doesn't work as I want. Where do I set the value of this environment variable?

OS: Windows

ADAMS-ver: 2019.2

MatLab-ver: R2019b

Thanks in advance!

Markus Kvist

EDIT: (2022-04-14)

The co-simulation works if I update the standard acar.cfg and replace the standard solver with my site solver, but this is only a solution for my test run at the moment. So my problem is still a exists.

I have also tried to run the same model with compatible versions of MatLab and ADAMS, but the problem still remains.

ADAMS-ver: 2018.1

MatLab-ver: R2017b

How do I setup the co-simulation to run with my site settings?

0 Alexis Del Rio over 3 years ago

Hi Markus,

To start with, it doesn't seem like Adams 2019.2 supports Matlab R2019b. please have a look at adams_20219_2_doc_release.pdf page 60:
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0 MKvist over 3 years ago

Hi,

The different release compatibility could be a reason. I have tried the similar thing with the MDI_Demo_Vehicle.asy and a simliar simulink model that is showed in the main question. This works fine!

So the issue is still that the cosimulation scripts doesn't use my defined solver dll. The variable ADAMS_exec in MatLab is defined with my defined solver dll, so that looks correct so far.

Is it enough to point out my local dll as "User Defined Library Name" when I create the control system in ADAMS?
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0 Martin Kieltsch over 3 years ago

If you have a private or site solver, you need to set the environment variable

MDI_ACAR_SITE

and let that point to the directory where your solver resides.

I usually tweak the bat files that start the analysis to include that environment.

Maybe a bit of fine tunung is required like putting the solve in <MDI_ACAR_SITE>/win64 or so (check the ADAMS topdir which is the required subdir for your ADAMS version & platform)

The more elegant solution is to compile your user-subs to a library like my_usersubs.dll and then use the appropriate ROUTINE statement like

ROUTINE/my_usersubs::reqsub

This dll works without any settings, if it's in the working dir
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0 MKvist over 3 years ago

I set the MDI_ACAR_SITE as a user environmental variable and it worked after I restarted MatLab! :-)

Thanks!
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