On Windows, when a PDF is opened in Adobe Reader, it appears to hold a lock on the file. This behavior means that if I want to re-run pdflatex to regenerate the file, I need to close it in Reader, run pdflatex, jump back to Reader, and reopen the file. Is there a way to make Reader not hold a lock while the file is open, like Preview on OSX and most other PDF readers I've used on other platforms?
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3[SumatraPDF](http://blog.kowalczyk.info/software/sumatrapdf/free-pdf-reader.html) is a reader for windows which does not lock the file. – Peter Zeller Apr 27 '11 at 09:40
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Thanks! That's exactly what I ended up using. – Lars Bergstrom May 05 '11 at 17:00
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Please consider answering your own question if @peq was right – Eduardo Costa Jul 20 '11 at 01:33
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As peq mentioned, SumatraPDF (http://blog.kowalczyk.info/software/sumatrapdf/free-pdf-reader.html ) is a great solution.

Lars Bergstrom
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15Which actually isn't an answer to the question asked. The question was if it was able to cause the behavior with Adobe Reader, not if there is an alternative. – gsnerf Apr 09 '13 at 09:08
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1Be aware that Sumatra asks for admin right and installs straight into Program Files. Utterly uncool!! – Ondrej Sotolar May 01 '13 at 09:35
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4Be aware that Sumatra now also comes in a portable version which does not require admin rights to install and can run from everywhere. The installer also now includes an option to customise the installation path. The actual answer to the question is (as far as I know) a plain strict no. There is no way to make Adobe not hold a lock on PDF files. – apokryfos Jun 19 '13 at 12:10
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2-1. This doesn't answer the question. SumatraPDF isn't perfect and has its deficiencies, and thus you could find in the main menu of SumatraPDF an option to open the file with Adobe Reader. – The Quantum Physicist Mar 31 '15 at 12:25
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As seen in this post in Adobe forum, the company considers this not to be a desirable feature but a bug.

Narciandi
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