unhandled exception trapped

[TraderYoda]

Hello support

I'm getting hundreds of the following error:
unhandled exception trapped - Specified Visual is already a child of another Visual or the root of a CompositionTarget.

What does this error mean?

I've emailed you my log and trace files

Appreciate your assistance

[NinjaTrader_Kate]

Hello jsk9000,

Thank you for your post.

We've been attempting to contact you at your email address but it appears you have not received our emails. Sometimes our support emails can get blocked by firewalls/spam filters. If this is the case please unblock NinjaTrader - platformsupport (AT) ninjatrader.com - so we may better assist you. Can I verify, have you received our previous emails?

Thanks in advance; I look forward to assisting you further.