Question
Creating a custom widget

I'm trying to build Zip file, according to given instructions in the document
Here is the link of doc :-
http://support.ptc.com/help/thingworx_hc/visual_sdk/Tutorial/CreatingWebComponentWidgetTutorial/#install-the-sdk-utility-and-create-a-thingworx-extension
and when I'm doing it. getting command not found issue
can any one give me solution for it ?

