Hi Jim, Yes you're right, I tried to open .osim in GUI Opensim 2.4 and I had similar error: Could not construct a model from arm26.osim Details: XMLDocument.XMLDocument: ERROR- SAX exception while attempting to parse arm26.osim SAXException message = The XML or Text declaration must start at line/co...

Thank you Ayman, Yes I got the version OpenSim 2.4 and the simulator opens successfully independent from Matlab. The only problem that I have is when I run the SFunction in simulink ( after getting the mex file out of Sfunction.cpp compilation). The Matlab used has version 32 bits ( tried on 2015b ,...

Dear OpenSim Team, I am trying to import OpenSim libraries to simulink where I have the OpenSimSFunction. The SFunction that i have access to is of version 2.3.1 and 1.9.1. But for that to work I need to download OpenSim 2.3.1 or 1.9.1 instead opensim 3.3 I have found the installation of opensim 1.9...