libgomp.so.1: Cannot Open Shared Object File: No Such File or Directory

If the error message

ImportError: libgomp.so.1: cannot open shared object file: No such file or directory.

appears when you try to launch VNL, fix it by running apt-get install libgomp1. This error typically appears on Ubuntu version 14.04 and later, where this library is not installed by default, as it was in earlier versions.