Error when changing keymap

[vendion]

Because I have <leader>s mapped for something else I tried to use the g:unstack_mapkey variable to map unstack to F7 or any other key but when I do I get the following error when launching a new vim session:

Error detected while processing /Users/vendion/.vimrc:
line  378:
E15: Invalid expression: <F7>
E15: Invalid expression: <F7>
Press ENTER or type command to continue

I am using Vim 7.4 patch 27

More version information

VIM - Vi IMproved 7.4 (2013 Aug 10, compiled Sep 13 2013 09:25:17)
MacOS X (unix) version
Included patches: 1-27
Compiled by Homebrew
Huge version without GUI.  Features included (+) or not (-):
+acl             +farsi           +mouse_netterm   +syntax
+arabic          +file_in_path    +mouse_sgr       +tag_binary
+autocmd         +find_in_path    -mouse_sysmouse  +tag_old_static
-balloon_eval    +float           +mouse_urxvt     -tag_any_white
-browse          +folding         +mouse_xterm     -tcl
++builtin_terms  -footer          +multi_byte      +terminfo
+byte_offset     +fork()          +multi_lang      +termresponse
+cindent         -gettext         -mzscheme        +textobjects
-clientserver    -hangul_input    +netbeans_intg   +title
+clipboard       +iconv           +path_extra      -toolbar
+cmdline_compl   +insert_expand   -perl            +user_commands
+cmdline_hist    +jumplist        +persistent_undo +vertsplit
+cmdline_info    +keymap          +postscript      +virtualedit
+comments        +langmap         +printer         +visual
+conceal         +libcall         +profile         +visualextra
+cryptv          +linebreak       +python          +viminfo
+cscope          +lispindent      -python3         +vreplace
+cursorbind      +listcmds        +quickfix        +wildignore
+cursorshape     +localmap        +reltime         +wildmenu
+dialog_con      -lua             +rightleft       +windows
+diff            +menu            +ruby            +writebackup
+digraphs        +mksession       +scrollbind      -X11
-dnd             +modify_fname    +signs           -xfontset
-ebcdic          +mouse           +smartindent     -xim
+emacs_tags      -mouseshape      -sniff           -xsmp
+eval            +mouse_dec       +startuptime     -xterm_clipboard
+ex_extra        -mouse_gpm       +statusline      -xterm_save
+extra_search    -mouse_jsbterm   -sun_workshop    -xpm
   system vimrc file: "$VIM/vimrc"
     user vimrc file: "$HOME/.vimrc"
 2nd user vimrc file: "~/.vim/vimrc"
      user exrc file: "$HOME/.exrc"
  fall-back for $VIM: "/usr/local/share/vim"
Compilation: /usr/bin/clang -c -I. -Iproto -DHAVE_CONFIG_H   -F/usr/local/Frameworks -DMACOS_X_UNIX -no-cpp-precomp  -Os -w -pipe -march=native -Qunused-arguments -mmacosx-version-min=10.8 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1
Linking: /usr/bin/clang   -L. -fstack-protector -F/usr/local/opt/python/Frameworks -L/usr/local/lib -F/usr/local/Frameworks -Wl,-headerpad_max_install_names -o vim        -lm  -lncurses -liconv -framework Cocoa    -framework Python   -lruby.2.0.0 -lobjc -L/usr/local/Cellar/ruby/2.0.0-p247/lib

[mattboehm]

My guess is that you didn't put in quotes in your vimrc. The line should read:

let g:unstack_mapkey="<F7>"

That seems to work for me, so let me know whether this fixes your issue or not.

[vendion]

Haha not sure why I did not catch that earlier, but but putting it in quotes worked thanks.