When I copy a shape in my application and then attempt to paste it, I get the error shown in the attachment.

Transcribed:
The Paste transaction FailedRolledback
Error Log:
1. Paste failed on a single node: Object reference not set to an instance of an object.

Can someone give me hint for where to start looking for what I've done wrong?

Thanks,
Herb.

I don't know how little code I can use to reproduce this.

It's occurring in a very large project that I can't send, for obvious reasons.

I've created my own library of shapes with custom objects attached to the tag property of the shape. Is it possible that this is causing problems with copy & paste?

Herb.