It should be -u NONE (all capitals)
-u NONE is the same result.
It is mtxrun related. It works in linux, so it could be windows related. I do not have a windows machine to test (and not enough diskspace to install windows on a VM).
mtxrun seems not execute the vim command line correctly.
As a last resort, what does the log file say for this (all in one line)
mtxrun --verbose --noquotes bin:vim "-u NONE -e -C -n -V10log -c \"set tabstop=8\" -c \"syntax on\" -c \"set syntax=c\" -c \"let contextstartline=1\" -c \"let contextstopline=0\" -c \"source c:/context/tex/texmf-context/tex/context/third/vim/2context.vim\" -c \"wqa\" \"vimdemo-vimsyntax.tmp\" " The log file list as follows:
"tabstop=8" [New File] line 0: set --- Options --- helplang=En ttyfast verbose=20 noloadplugins updatecount=0 verbosefile=log iskeyword=@,48-57,_,192-255 line 0: syntax No Syntax items defined for this buffer line 0: set --- Options --- helplang=En ttyfast verbose=20 noloadplugins updatecount=0 verbosefile=log iskeyword=@,48-57,_,192-255 line 0: let b:changedtick #3 v:version #702 v:beval_winnr #0 v:lnum #0 v:scrollstart command line line 0 v:dying #0 v:lang C v:count #0 v:progname vim.exe v:cmdbang #0 v:foldlevel #0 v:ctype C v:prevcount #0 v:mouse_win #0 v:count1 #0 v:foldstart #0 v:foldend #0 v:profiling #0 v:beval_col #0 v:beval_lnum #0 v:mouse_lnum #0 v:beval_bufnr #0 v:shell_error #0 v:servername VIM v:lc_time English_United States.1252 v:searchforward #1 v:mouse_col #0 v:statusmsg line 0: let line 0: let b:changedtick #3 v:version #702 v:beval_winnr #0 v:lnum #0 v:scrollstart command line line 0 v:dying #0 v:lang C v:count #0 v:progname vim.exe v:cmdbang #0 v:foldlevel #0 v:ctype C v:prevcount #0 v:mouse_win #0 v:count1 #0 v:foldstart #0 v:foldend #0 v:profiling #0 v:beval_col #0 v:beval_lnum #0 v:mouse_lnum #0 v:beval_bufnr #0 v:shell_error #0 v:servername VIM v:lc_time English_United States.1252 v:searchforward #1 v:mouse_col #0 v:statusmsg line 0: let line 0: source Error detected while processing command line: E471: Argument required line 0: wqa
If this does not work, does replacing bin:vim with bin:gvim work?
No. Andy