If you have both Ultisnips and NeoComplete then you cannot use the same
key for expansion. I used to have tab mapped out to both for completion
with AutoComplPop and Ultisnips. I had tab set for
g:UltiSnipsJumpForwardTrigger but NeoComplete still doesn’t like it.
So now, that’s changed to Control + Tab and things are good again.
let g:UltiSnipsExpandTrigger="<C-CR>" let g:UltiSnipsJumpForwardTrigger="<C-tab>" let g:UltiSnipsJumpBackwardTrigger="<s-tab>"
Only wish one NeoComplete OR Ultisnips makers see this and make it work without conflict