Comment 8 for bug 1275449

okay, that is super strange. Obviously the plugin is found and sourced correctly since all the mappings are found. Maybe it is not finding any snippets.

try adding this to ~/.vim/UltiSnips/all.snippets

snippet test
this is a test
endsnippet

and try test<tab> in a new vim window.

otherwise you will need to reduce your configuration to a minimal .vimrc and only have UltiSnips in your path and then bring stuff back one by one to find out what breaks here.