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I am having trouble with running the .tex file, while the PDF output is open. It does not allow me to run the file while it is open, thus I need to close it in order to run the .tex file. Is there any way to overcome this?

p.s: I am doing it in Dropbox. Can this be the reason?

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see configure-texniccenter-with-something-else-than-adobe-reader-x and try Sumatra – cmhughes Jul 13 '12 at 16:28
up vote 3 down vote accepted

Perhaps you need to configure the viewer setting in TeXnicCenter as follows.

enter image description here

Edit 3

I am assuming that you use Adobe Acrobat Reader 32 bit version 10.x.

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Alternatively, you could use SumatraPDF for your viewer. It doesn't lock the PDF file the way Adobe Reader does. – Mike Renfro Jul 13 '12 at 15:00

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