Need to view multiple pdf documents
July 1, 2010 11:31 AM   Subscribe

Has anyone ever gotten this error message when trying to open two .pdf documents (I'm using Adobe Acrobat Pro 9.0)? "You can not use multiple instance of program at the same time."?

I've completely stumped our IT department and anyone else I've asked. My only workaround is to only view one .pdf document at a time and this is not going to work in the long term. I frequently need to be able to compare two .pdf documents. I uninstalled Acrobat 9.0 and reinstalled it and that didn't do anything. HELP!
posted by SheIsMighty to Computers & Internet (6 answers total)
how many copies/versions of Adobe do you have loaded on your computer. Is one of the documents attempting to open in a different version than you already have running?
posted by HuronBob at 11:38 AM on July 1, 2010

I have seen that recently with an Adobe product, and it was not the adobe product itself complaining but it was the updater/installer program that was kicked off. Is it trying to do an update when you launch acrobat? If so, try to complete the update. I believe adobe updates are indicated by a white box-like icon in the system tray (bottom right corner of the screen).

On my computer, after finishing the update I didn't see that popup anymore.
posted by escher at 11:48 AM on July 1, 2010

I don't have any other versions of Adobe Acrobat on my computer (at least, there are none listed in the Add/Remove Programs list). I do have Adobe Bridge and Adobe Illustrator and Adobe SVG Viewer. Can I get rid of the Bridge program or the SVG Viewer? Will removing either of those break Illustrator?
posted by SheIsMighty at 11:56 AM on July 1, 2010

Foxit Reader generally works well. Never had a problem opening multiple items.
posted by pyro979 at 11:57 AM on July 1, 2010

Update! Apparently, if I'm in the Acrobat program and do File / Open, I can open several pdf documents. I am still getting the error when I try to double click on a document to open it, then try to double click on another one to open it.
posted by SheIsMighty at 12:08 PM on July 1, 2010

Windows or Mac? If it's Windows, you might have a program running that's not pumping messages, blocking the file-open DDE broadcast and causing Explorer to try to launch another instance of Reader instead.
posted by zixyer at 12:18 PM on July 1, 2010

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