Change parameters such as Height, Age and Weight

[Thomas Uchida]

If you enter those lines of code in the ScriptingShell Window, after entering the last line and pressing <Enter>, the coordinates of the marker with respect to the Ground reference frame should be printed. Based on the screenshot in your post, perhaps you copied and pasted all lines at once? Try typing or pasting each line in separately and pressing <Enter> after each line. Please see the "Scripting" section in the documentation (https://simtk-confluence.stanford.edu:8 ... /Scripting) for additional information about how to use the scripting interface in the GUI.