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Of course, these are just guesses. BTW, this behavior also happens when I use the --noplugins flag to start vim.

Of course, these are just guesses. BTW, this behavior happens regardless of whether the --noplugins flag is present or not when vim is started.

I am attempting to write a vim function in my vimrc. It should modify the currently edited file (eg abc.txt), then write the modified contents to another file (eg abc_x.txt), and finally return to continue editing abc.txt. My verion of vim is 8.1.5126.

I am attempting to write a vim function that I would like to be loaded automatically when vim starts, thus I am putting it in my vimrc (but maybe that is wrong?). When called during normal editing, it should write a modified version of the current buffer's contents to another file, and then return me to my original file to continue editing it. My version of vim is 8.1.5126.

function! Write_new_file() " Hold the original and new file names in variables. let l:fn_no_ext = expand('%:p:r') let l:fn_ext = expand('%:e') let l:original_name = l:fn_no_ext.'.'.l:fn_ext let l:new_name = l:fn_no_ext.'_x.'.l:fn_ext " Save the current state of the original file. write " Assign a new file name to the current buffer. exe 'file '.l:new_name " Make all the modifications to the current buffer. call Many_Modifications() " Save the modified buffer to the new file. write! " Return to editing the original file. exe 'edit! '.l:original_name endfunction 

function! Write_new_file() " Hold the original and new file names in variables. let l:fn_no_ext = expand('%:p:r') let l:fn_ext = expand('%:e') let l:original_name = l:fn_no_ext.'.'.l:fn_ext let l:new_name = l:fn_no_ext.'_x.'.l:fn_ext " Save the state of the current buffer to the original file. write " Assign a new file name to the current buffer. exe 'file '.l:new_name " Make all the modifications to the current buffer. call Many_Modifications() " Save the modified buffer to the new file. write! " Return to editing the original file. exe 'edit! '.l:original_name endfunction