how come US.txt cannot be found as the file is in pset8
File /home/ubuntu/workspace/pset8/bin/path/to/US.txt cannot be found!
Any help will be well appreciated.
Because /home/ubuntu/workspace/pset8/bin/path/to/US.txt
doesn't exist! Where did you download US.txt to? That is where your import program should look for it. From the instructions:
where /path/to/US.txt is indeed the (relative or absolute) path to that file
"/path/to" is simply a place holder for the actual path to your US.txt file.