simtk.org

Hi,
I'm trying to run the updated version (tf_joint_FEBio_v2.feb) in FEBio v.2.1 on Mac OS X but receive the following errors:

Failed loading plugin libFENeoHookeanPI.dylib
Reason: Failed to load the file.

FATAL ERROR: Rigid body rotations cannot mix prescribed and free components.
Rigid body: 0, Material: 0

I thought the neo-hookean plugin was already available in the standard FEBio release?
Do I need to build the plugin separately?

Thanks!
Todd

Hi Todd,

I am relaying the information I got from Steve Maas. Apparently you don't need a plugin for the Open Knee(s) - Generation 1 model. You may want to remove the import line from febio configuration file (febio.xml) if there is any. Also, the error about NeoHookean plugin is a warning. The simulation does not work due to "FATAL ERROR: Rigid body rotations cannot mix prescribed and free components." This issue was just recently addressed. The version that I was getting this model ran was FEBio v2.1.2.6432. I am wondering if the MAC version is older. You may want to use the latest available version of FEBio.

Cheers,

Ahmet

Hi Ahmet,
Thanks for your fast reply.
Problem solved! Everything seems to work fine with the newest FEBio version (v.2.2)
Thanks!
Todd