Problem keeping .pdf file open - "volume externally changed..."

I use Adobe Acrobat daily in my real estate business. I save or print a .pdf file of pretty much every document I use. Every day, I run into this problem: I'll have a .pdf file open for reference, and no matter what length of time I have the file open, whether 5 minutes or 30 minutes or anywhere in between, when I try to look back at the file and scroll down or up or even just click on the page somewhere, a little dialogue box pops up that says: The volume of the file has been externally altered so that the opened file is no longer valid." Then I click "OK" and try to navigate the file, and all my information in the file is blanked out, it's just a blank white page. I can exit out of the file and reopen and all my information is visible again, but after a bit of time, the same thing happens again. Very frustrating and time consuming, to have to keep exiting and reopening the file just to read it. I work on a shared drive of about 6 computers, but no one else is looking at the same file as me at the same point in time that I am accessing the file, so I know that's not the problem...Any help in this matter would be greatly appreciated! Just FYI, I am running Windows 7, and the version of Adobe Acrobat I am running is Adobe Acrobat 8.3.1 Professional.

Is the issue happening with all PDFs that you access? Or some of them? Could you try and get a new PDF from the web and try opening it and see if it might be a problem with the PDFs as such.

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/Library/Internet Plug-ins
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Hey,
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2014-10-14 22:26 GMT+03:00 Romil Mittal <[email protected]>:
>> Why won't some pdf-files open on tablet/phone? created by Romil
>> Mittal <https://forums.adobe.com/people/Romil+Mittal> in *Adobe Reader
>> for Android* - View the full discussion
>> <https://forums.adobe.com/message/6825723#6825723>
>>

Problem keeping .pdf file open - "volume externally changed..."

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