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Re: Ediff error -- Permission denied (Win8)

From: dbbd
Subject: Re: Ediff error -- Permission denied (Win8)
Date: Mon, 9 Mar 2015 03:39:36 -0700 (MST)

Hi Eli,

thanks for this post.  In fact, I have the same permission denied problem
(emacs 24.3 under windows7, cygwin installed and added to windows path, diff
working in DOS-terminal; problem still present if I log in as
Administrator).  So I followed your advice, and here is the backtrack:

Debugger entered--Lisp error: (file-error "Searching for program"
"permission denied" "diff")
  call-process("diff" nil #<buffer *ediff-diff<2>*> nil "c:\\Program Files
(x86)\\GNU\\emacs-24.3\\README" "c:\\Program Files
  apply(call-process "diff" nil #<buffer *ediff-diff<2>*> nil ("c:\\Program
Files (x86)\\GNU\\emacs-24.3\\README" "c:\\Program Files
  ediff-exec-process("diff" #<buffer *ediff-diff<2>*> synchronize "--binary"
"c:\\Program Files (x86)\\GNU\\emacs-24.3\\README" "c:\\Program Files
  ediff-make-diff2-buffer(#<buffer *ediff-diff<2>*> "c:\\Program Files
(x86)\\GNU\\emacs-24.3\\README" "c:\\Program Files
  ediff-setup-diff-regions("c:\\Program Files
(x86)\\GNU\\emacs-24.3\\README" "c:\\Program Files
(x86)\\GNU\\emacs-24.3\\README.W32" nil)
  ediff-setup(#<buffer README> "c:/Program Files
(x86)/GNU/emacs-24.3/README" #<buffer README.W32> "c:/Program Files
(x86)/GNU/emacs-24.3/README.W32" nil nil nil ((ediff-job-name .
ediff-files)) nil)
  ediff-files-internal("c:/Program Files (x86)/GNU/emacs-24.3/README"
"c:/Program Files (x86)/GNU/emacs-24.3/README.W32" nil nil ediff-files)
  ediff-files("c:/Program Files (x86)/GNU/emacs-24.3/README" "c:/Program
Files (x86)/GNU/emacs-24.3/README.W32")
  call-interactively(ediff-files nil nil)

Any idea why the permission could be denied coming from emacs, but diff runs
fine when started directly in the DOS terminal?

Thanks a lot in advance!

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