IB not liking basket derivatives

Options linked to a basket of securities that is. Very strange. Anyone experienced with this stuff?

 

yes

If you are unaware of it, this is a useful place to start
https://infomemo.theocc.com/infomemo/search

 

Is the idea to dump derivatives upon structural changes?

 

Sorry I don't understand your question.

What "idea" ?
What structural change?
What exactly do you mean by "dump[ing of] derivatives"?