Hello all, running the scale tool on a mac seems to work (even if at the end of the script an error occurred while running the ik optimizer) and I can get a scaled Osim model at the end. however, when I tried to run the ik tool, the optimizer failed. It seems to be an issue with the ipopt routine. I tried to change the optimizer from ipopt to cfsqp, but the program couldn't find the libosimCFSQP.so library. I wonder whether the compiled tools are standalone or whether I need to install the SimTK libraries. Thanks! Guillaume %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Guillaume Rao, PhD Institute of Movement Sciences University of the Mediterranean, Marseille, France. E-mail: guillaume.rao@univmed.fr Phone: +33 (0) 4 91 17 04 22 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%