! LaTeX Error: File 'tensor.sty' not found.
however, it is there, in:
along with an army of other similar files..
I'm using ubuntu..
..looks like I can get around the problem by putting: /usr/local/texlive/2013/texmf-dist/tex/latex/tensor/tensor.sty
in the command-line of texworks where it asks for it.. but that isn't a real solution..