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I am new to LaTeX and using it for my thesis. However, right now I am having trouble in using latexdiff. I did the instructions as follows:

Question: How to generate latexdiff on Windows?

Answer:

  1. Download and install ActivePerl?

    Assume you install ActivePerl? in C:\Perl

  2. Download latexdiff perl script

    Assume you download latexdiff to C:\temp

  3. The latexdiff script makes use of the Perl package Algorithm::Diff

    Unzip Algorithm-Diff-1?.1902.tar.gz, and then copy whole Algorithm-Diff-1?.1902\lib\Algorithm directory to C:\perl\lib

  4. Assume you have a old LaTeX file name old.tex and a new LaTeX file named new.tex both located in C:\temp

  5. Start a new command prompt, type cd c:\temp to change the current directory to c:\temp. Type perl latexdiff old.tex new.tex > diff.tex, this will generate a new LaTeX file named diff.tex that contains the different between old.tex and new.tex

However, every time I typed c:\temp\perl latexdiff old.tex new.tex > diff.tex, the system says "perl is not an internal or external file", every time I typed c:\temp\latexdiff old.tex new.tex > diff.tex, it says "The perl interpreter could not be found." I have already checked the PATH variable, and it contains path to perl in c:\perl64\bin. What should I do next? I have exhausted every method but could not find a way.

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steve
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    If your Perl interpreter (perl.exe) is in C:\Perl, than your PATH should contain that, and not C:\perl64\bin. – marczellm Sep 03 '13 at 20:17
  • You say that you typed c:\temp\perl but the instructions say to type cd c:\temp. This should be followed by pressing the Return/Enter key (implied in the instructions -- all commands need to be completed in that way). Then type perl latexdiff old.tex new.tex > diff.tex. Since you don't have perl.exe in c:\temp, the OS would give "perl is not an internal or external file" if you do c:\temp\perl. – Nicola Talbot Sep 04 '13 at 10:32

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