[solved]Fiberlength error in forward dynamics simulation using scaled model

[Yuichiro Omura]

I apologize for keeping posting.
I'm using a model based on gait2392 like the attached file.
I tried to scale the model using experimental data and perform forward dynamics simulation.
However, simulations didn't proceed not at all because of the following error in almost all muscles:

Code: Select all

Error detected by Simbody method MuscleFixedWidthPennationModel::calcPennationAngularVelocity: Fiber length cannot be zero.
  (Required condition 'fiberLength > 0' was not met.)

When I tried simulating using not my code but in GUI, the same error happened.
I therefore think the model muscle parameters are wrong.
Before scaling, this error hasn't been seen.
I saw this post: viewtopicPhpbb.php?f=91&t=13307&p=38202&start=0&view=
however, can scaling cause this to happen?
Is there anything I need to do?

Best regards,

[Yuichiro Omura]

This problem was solved.
The reason is the inertia parameters of the platform which we uses as ground are 0.
I have no idea why these parameters lead to muscle fiber length error, but solved.
Sorry for the trouble.