Thank you for your quick answer. Thanks to your answer, I found that the problem came from the fact that I do not have force date in my c3d files. I think I suceed in modifying the scripts so that forces are not looked for by the scripts and functions.

Hello, I cannot succeed in using the c3dExport.m script also it seems that I've followed the complete installation process of matlab librairies. I've checked the PATH in the windows environment variables and checked in Mtalab with the command: org.opensim.modeling.opensimCommon.GetVersion() I have a...