Hi Ayman, I think I didn't explain the case very well in my previous post and therefore I attach the files I am referring to in order to make it clearer.I am a beginner in inverse dynamics analysis and OpenSim and probably this justifies the problems I face. My partner is working with the Lumbar_C_2...

Hi Ayman and Pierre, Ayman,thank you very much for your response and I am sorry for my late reply.The ID failed and I think I am at the first case of your description so I am currently working on that. In the mean time,a partner that is performing similar analysis with OpenSim passed me the predicte...

Hi Pierre, I am similar to you a new user to OpenSim and I have exactly the same problem running the Christophy model for the lumbar spine including 238 muscles (https://simtk.org/project/xml/downloads.xml?group_id=567). Although the inverse dynamics worked for a 40d flexion load,the static optimiza...