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I try to copy and paste in a LyX document I am editing and it says that the command (paste) is disabled. This happens with anything, be it normal text, figures or formulae. I am working on a 64 bit PC with Windows 7 and using Lyx 2.0. I checked the document settings in short cuts and they are set. This is so frustrating. Can anyone help me please?

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This may be because Ctrl+V is bound to some other command. Can you paste by using the regular Edit menu? –  Werner Feb 2 '12 at 7:17
I suppose that you have a write protected document. That happens for all example documents of the LyX documentation. –  Herbert Feb 2 '12 at 7:36

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I have the same problem when I use LyX 2.0.2 on 64 bit PC with Windows 7. It happen sometimes, and can be resolved by restarting the LyX. I also use LyX on other OS, e.g., 32 bit Windows 7 and Ubuntu, and never encounter this problem there. Maybe this is a compatibility issue on the 64 bit Windows.

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Just save everything, close it and open it again (restart as Shoreming mentioned). It'll work hopefully. –  user14013 Apr 27 '12 at 10:55
Had the same problem - restarting the computer solved it. –  user16277 Jul 4 '12 at 20:00
Problem still exists in LyX 2.0.6 (Win7 x64). Restarting LyX still solve the problem. –  Juve Dec 3 '13 at 14:34

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