Question: I am using Visio professional 2003. It was working fine. But now when I copy and paste any shapes it showing the error "Open clipboard failed". After that I am not able to change any properties or name.

When I try to close the window it is showing warning as "You cant quit visio program because a program is handling an event from visio. If VBA at break point, reset VBA, then quit"

Can anyone tell me what the problem is?

Answer: 
this has been a problem with Visio for 7 years and the last 3 versions of the product([Visio 2003](http://www.dotnet247.com/247reference/msgs/42/214420.aspx) to [Visio 2010](http://social.technet.microsoft.com/Forums/en-AU/visiogeneral/thread/5f3b6b7b-e206-4c9e-b54a-cf430a7cc7ac)). 

The issue happens if you are running some other clipboard manager, like [ditto](http://ditto-cp.sourceforge.net/) or [similar](http://www.techsupportalert.com/best-free-clipboard-replacement-utility.htm#Quick_Selection_Guide). The only thing you can do is use task manager to kill visio, then disable any clipboard manager you are using and restart visio.
I'd like to ring in that I had this issue when a Citrix session remoting to server 1 which was remoting to server 2 went into "triple lock": The screen saver in all three servers had kicked in. Ditto went crazy as did every app that I used the clipboard in.

Once I unlocked the sessions (which were lagging like crazy) everything went back to normal.