This error means that the IDE failed to access the clipboard. It usually happens when there is another program that manipulates the clipboard. Remote desktop for example.
Okay.
I was able to reproduce the behavior only under this circumstance, running the program in debug mode on the emulator, and making the copy from the IntelliSense help two or more times.
On a real device it didn't happen to me.
I don't know the cause, if it's a problem with the emulator or what.