IB error when trying to purchase warrants

I'm trying to purchase a warrant listed on the TSX Venture exchange (with Interactive Brokers). When I go to purchase I get this box to popup when trying to transmit:

"This contract can only be closed."

What is that all about?

 

warrant may be subject to delisting

 

Hmm, found out IB carries very few CAD warrants. I'll send them an email and see if they can open a few of them for trading, it would be a great feature of IB if they would allow all CAD warrants open for trading.