ultisnips expand not working and I can't figure out why

Question

I removed practically everything while troubleshooting. Vim opens without error, :UltiSnipsEdit works but when I enter snip<tab> an actual tab is entered. My current vimrc. The configs have been copied from github for both Vundle and UltiSnips.

set nocompatible
filetype off

"set the runtime path to include Vundle and initialize
set rtp+=~/.vim/bundle/vundle/
call vundle#rc()

" let Vundle manage Vundle, required
Plugin 'gmarik/vundle'
Plugin 'SirVer/ultisnips'

filetype plugin indent on

let g:UltiSnipsExpandTrigger="<tab>"
let g:UltiSnipsJumpForwardTrigger="<c-b>"
let g:UltiSnipsJumpBackwardTrigger="<c-z>"

" If you want :UltiSnipsEdit to split your window.
let g:UltiSnipsEditSplit="vertical"

verbose imap <tab>

i  <Tab>       * <C-R>=UltiSnips#ExpandSnippet()<CR>
    Last set from ~/.vim/bundle/ultisnips/autoload/UltiSnips/map_keys.vim

:version

:version
VIM - Vi IMproved 7.4 (2013 Aug 10, compiled Jan 10 2014 09:33:13)
Included patches: 1-135
Compiled by Arch Linux
Huge version with GTK2 GUI.  Features included (+) or not (-):
+acl             +cindent         +conceal         +digraphs        +farsi           +gettext         +libcall         +mksession       +mouse_netterm   -mzscheme        +profile         +scrollbind      +syntax          +textobjects     +visualextra     +X11
+arabic          +clientserver    +cryptv          +dnd             +file_in_path    -hangul_input    +linebreak       +modify_fname    +mouse_sgr       +netbeans_intg   +python          +signs           +tag_binary      +title           +viminfo         -xfontset
+autocmd         +clipboard       +cscope          -ebcdic          +find_in_path    +iconv           +lispindent      +mouse           -mouse_sysmouse  +path_extra      -python3         +smartindent     +tag_old_static  +toolbar         +vreplace        +xim
+balloon_eval    +cmdline_compl   +cursorbind      +emacs_tags      +float           +insert_expand   +listcmds        +mouseshape      +mouse_urxvt     +perl            +quickfix        -sniff           -tag_any_white   +user_commands   +wildignore      +xsmp_interact
+browse          +cmdline_hist    +cursorshape     +eval            +folding         +jumplist        +localmap        +mouse_dec       +mouse_xterm     +persistent_undo +reltime         +startuptime     -tcl             +vertsplit       +wildmenu        +xterm_clipboard
++builtin_terms  +cmdline_info    +dialog_con_gui  +ex_extra        -footer          +keymap          +lua             +mouse_gpm       +multi_byte      +postscript      +rightleft       +statusline      +terminfo        +virtualedit     +windows         -xterm_save
+byte_offset     +comments        +diff            +extra_search    +fork()          +langmap         +menu            -mouse_jsbterm   +multi_lang      +printer         +ruby            -sun_workshop    +termresponse    +visual          +writebackup     -xpm
   system vimrc file: "/etc/vimrc"
     user vimrc file: "$HOME/.vimrc"
 2nd user vimrc file: "~/.vim/vimrc"
      user exrc file: "$HOME/.exrc"
  system gvimrc file: "/etc/gvimrc"
    user gvimrc file: "$HOME/.gvimrc"
2nd user gvimrc file: "~/.vim/gvimrc"
    system menu file: "$VIMRUNTIME/menu.vim"
  fall-back for $VIM: "/usr/share/vim"
Compilation: gcc -c -I. -Iproto -DHAVE_CONFIG_H -DFEAT_GUI_GTK  -pthread -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/include/pango-1.0 -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/libdrm -I/usr/include/libpng16 -I/usr/inclu
de/gdk-pixbuf-2.0 -I/usr/include/libpng16 -I/usr/include/pango-1.0 -I/usr/include/harfbuzz -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/freetype2  -D_FORTIFY_SOURCE=2  -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector --
param=ssp-buffer-size=4 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1
Linking: gcc   -L. -Wl,-O1,--sort-common,--as-needed,-z,relro -fstack-protector -rdynamic -Wl,-export-dynamic -Wl,-E -Wl,-rpath,/usr/lib/perl5/core_perl/CORE  -Wl,-O1,--sort-common,--as-needed,-z,relro -L/usr/local/lib -Wl,--as-needed -o vim   -lgtk-x11-2.0 -lgdk-x11-2.0 -l
pangocairo-1.0 -latk-1.0 -lcairo -lgdk_pixbuf-2.0 -lgio-2.0 -lpangoft2-1.0 -lpango-1.0 -lgobject-2.0 -lglib-2.0 -lfontconfig -lfreetype  -lSM -lICE -lXt -lX11 -lXdmcp -lSM -lICE  -lm -lncurses -lelf -lnsl   -lacl -lattr -lgpm -ldl  -L/usr/lib -llua -Wl,-E -Wl,-rpath,/usr/li
b/perl5/core_perl/CORE -Wl,-O1,--sort-common,--as-needed,-z,relro -fstack-protector -L/usr/local/lib  -L/usr/lib/perl5/core_perl/CORE -lperl -lnsl -ldl -lm -lcrypt -lutil -lpthread -lc -L/usr/lib/python2.7/config -lpython2.7 -lpthread -ldl -lutil -lm -Xlinker -export-dynami
c   -lruby -lpthread -lgmp -ldl -lcrypt -lm  -L/usr/lib

ls -la .vim folder

drwxr-xr-x  4 trevor users 4.0K Mar 26 12:37 ./
drwx------ 29 trevor users 4.0K Mar 26 12:56 ../
drwxr-xr-x  4 trevor users 4.0K Mar 26 12:36 bundle/
drwxr-xr-x  2 trevor users 4.0K Mar 26 12:47 UltiSnips/

Thanks in advance for any help! I have been tearing my hair out trying to figure out what is wrong.

Answer 1

I figured it out. So with the current version there is no default snippets not even snip <tab>. Once I added this: Bundle 'honza/vim-snippets' Everything started working.

Answer 2

In my case, newly-defined custom snippets were not expanding.

Per the help file, I had defined a directory where my snippets were to be located:

let g:UltiSnipsSnippetsDir="/Users/tony/ultisnips"

:UltiSnipsEdit! showed this directory in the list of selectable snippets files to edit. So I thought everything should work. I could add snippets via :UltiSnipsEdit to my custom file just fine. But, apparently, that isn't sufficient to actually get UltiSnips to find files therein when expanding.

My snippets were only expanded after I added the same directory to the list of directories to be searched:

let g:UltiSnipsSnippetDirectories=["/Users/tony/ultisnips", "UltiSnips"]

Answer 3

In my case UltiSnips wasn't expanding because I had set paste in my .vimrc. Turning on that setting disables key mappings in the insert mode. Try to remove that setting. It worked for me.

Answer 4

In my case, UltiSnips wasn't working on NeoVim, without any error message.

:UltiSnipsEdit returned "Failed to load python3 host", which led me to https://github.com/fsharp/vim-fsharp/issues/96.

UltiSnips apparently needs the neovim Python package, so running pip install neovim solved the problem.