Couldn't find the simple solution on SO, so thought I would add this here for anyone looking in the future.
My symptom was that I could copy and paste within the IJ editor, but not from the editor to another application or from another app to the editor.
This was on Windows 10 with IntelliJ IDEA 14.1.6.
Set the caret anywhere in the line to copy the whole line, or make a selection to copy. Press Ctrl+C or choose Edit | Copy from the main menu .
Then click Command + A or Ctrl + A to select all the text and then click Cmnd + c or Ctrl + c to copy.
From the main menu, select File | Repair IDE. IntelliJ IDEA will automatically launch the first recovery step and refresh the virtual file system. IntelliJ IDEA will display a notification that you can use to continue or complete the recovery process.
To make copy/paste through shortcut keys working with Vim Plugin you need to change some settings of Intellij IDE's editor regarding vim emulation, you need to follow these steps for it:
The Shortcuts will start working, happy coding :)
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