what i am trying to do is build custom widgets using eclipse , i tried to install the extension provided
in the thingworx marketplace like Eclipse plugin for thingworx extension ,when i try to install it it gives
a error message "Could not find jar :file:/E:/TW_Download_Eclipse_Plugin for Thingworx extension zip!/."
Please refer to the guide found at the bottom of the Eclipse plug-in download page on the Marketplace.
You wouldn't be importing it as an extension to the compose but instead to the Eclipse itself (Mars 4.5 or higher)