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Activate/Deactivate force in template - MotionView

This topic has been posted before, but that solution is not working for me.
Have the following template:

<Simulate
analysis_type = "Transient"
end_time = "5"
print_interval = "0.01"
/>
<STOP/>

It's writing text to solver command file for MotionSolve. The edit box is clicked out before solving. The id string is evaluated to correct number.

Following error message window pops up after the initial 0.5s:
Motion runtime error
'function' object has no attribute '_bases_'
However no error message in the log.

If I replace the "deactivate force"-code with a "deactivate joint" it works.
If I remove the "deactivate force"-code it works.

Please help me understand what i'm doing wrong.

/Dave

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Accepted answers

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Christopher_Fadanelli

Hi David,

Are you running this live? Can you try running the model "offline"?

Best,

Christopher Fadanelli

GTT Adam

Hi @David_Lindberg_1,

If you remove the deactivate statement as you say, then of course the Template should run successfully as you are not making any model changes during the run. You would essentially be running a Transient simulation for 0.5 seconds and then running it again for another 5 seconds.

If this Template was provided to you, please replace the "{frc_0.idstring}" syntax with an entity that exists in your model. Perhaps frc_0 does not exist in your model, so you are trying to deactivate something that has not been created.

Lastly, in some older versions on MotionView, the "/>" syntax must only be ">". So instead, try:

Hope this helps!

Adam Reid

David_Lindberg_1

Hi,

GTT Adam, should of course stated which version I'm running, its 2024.1. Off course it should run when I remove the force-code, but wanted to point out that error is not within the remaining code.

Christopher_Fadanelli, I'm running the solver live. Have licensing issues running it offline. I'll investigate that further.

Thanks!

Christopher_Fadanelli

Hi @David_Lindberg_1 ,

Can you do me a favor and go to File > Help > Updates and System Information. In the new popup window, do you see at least hwdesktop and hwsolvers? If you do not see hwsolvers, you will need to install the mechanical solvers in the same location as hwdesktop.

Best,

Christopher Fadanelli

David_Lindberg_1

Hi Christopher_Fadanelli,
Sure thing! It looks like I have everything I need.

Regards,

David

GTT Adam

Hi @David_Lindberg_1,

My apologies, I missed that you had already checked to ensure the idstring evaluates.

Are you able to attach the model so we can take a look?

If it contains sensitive information, then you can always create a simplified model that uses the same type of entities to still get the same behaviour.

Alternatively, can you attached the LOG file so we can check to see if there are any other hints as to the stoppage in iit?

Either way, it seems like the issue with the Template is isolated to the Force entity you are trying to manipulate. Can you provide any detail about the Force?

Hope this helps!

Adam Reid

David_Lindberg_1

Hi GTT Adam,
I've recreated the issue in a simplified model. The model simulates a box in force equilibrium (two equal but opposite directed forces) with initial velocity. When the box hits the ground (time based in this model. Planned to be sensor driven) one of the forces shall be deactived.
After 0.5s in simulation I get the following error message:

Test_for_Altair.mdl

Regards,
/David

David_Lindberg_1

Hi GTT Adam & Christopher_Fadanelli,
It works when I solve it offline XML solver. So it's a bug when solving it live. I'll report it.

Thanks!
Cheers,
David