[tex-live] windows multiple tl versions

Joseph Wright joseph.wright at morningstar2.co.uk
Mon Dec 26 12:51:18 CET 2011

On 26/12/2011 01:33, Karl Berry wrote:
> Siep or anyone,
> Suppose I install vanilla TL 2010 on a Windows machine.
> Now suppose I install vanilla TL 2011 on that same Windows machine.
> Do any conflicts result?
> How about if I do it in the other order/
> I know (I think) that the files will end up in different directories,
> just as they do on Unix.  But what about the registry or other Windows
> magic?  Does 2011 overwrite something global from 2010, such that you
> cannot switch simply by changing the path?
> Put another way, for complete confidence, is it necessary to uninstall 
> one version before installing another, on Windows?  I think/hope the
> answer is no, but a user asked me, and I realized I wasn't sure.
> The Administration section of http://tug.org/texlive/windows.html has
> the weasel words "(at least)".  So, still not sure.
> The Windows registry section in the manual talks about interesting
> registry keys in the abstract, but not what TL sets (if it sets
> anything).  So, still not sure.
>>From windows.html I realize there is this distinction of where the new
> directory is auto-added to the Windows PATH.  That's fine.  I'm worried
> about things that make changing the PATH insufficient.
> Thanks,
> k

Hello Karl,

I have no issues switching between different TeX Live installations on
Windows. A quick look at the Registry suggests that there are no
critical settings there for TL. (I assume the uninstall information is
set, but that should not be relevant here.)
Joseph Wright

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