I have installed UltiSnips through Vundle as per the instructions given on the git page. :PluginInstall did not return any errors, so I assumed it worked well. Upon trying to use :UltiSnipsEdit, though, I received a set of errors:
Error detected while processing function UltiSnips#Edit:
line 8:
E121: Undefined variable: file
E116: Invalid arguments for function len(file)
E15: Invalid expression: !len(file)
I have tried clarifying the path to my directories through:
let g:UltiSnipsSnippetDirectories=['/h/usr/.vim/bundle/vim-snippets/UltiSnips/']
where here I've used 'usr' to indicate my personal user directory in /h. I similarly clarified my paths to python, as another post I saw with the exact same error had an issue with that. Neither of these have worked. UltiSnips does not work at all at the moment either, not just this command.
I am quite new to vim customization and vim more generally, and would greatly appreciate any insights into this issue.