This seems to be working with Febio 2.5 but not with Febio 2.1. The error that I get in the latter case is - Failed loading plugin libFENeoHookeanPI.dylib Reason: Failed to load the file. ===== reforming stiffness matrix: Nr of equations ........................... : 184062 Nr of nonzeroes in stiffn...

I get the following error, a part of which is new and another part is the same old problem, when I try running v2 on febio 2.1 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, Ma...

I did run the updated file as well, and the error I was running into was:

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

Any hints on what may be wrong?

Thank you, really appreciate your help!

Hello, I am using Febio 2.5 on Mac OSX and trying to run the file tf_joint.feb from OpenKnee 1.0 on the same. I get the following error when I attempt to run the file: FATAL ERROR: Missing attribute "mat" of tag "Elements" (line 97012) When I open the file, I can see the attribute "mat" defined for ...