I noted in another thread that Ctrl-T opens a new tab. That makes it quite easy to create zombie TCCs (tab TCCs left running when TCMD is closed). Start TCMD. Hold down whatever Ctrl key is sent to TCMD and press T several times as fast as possible. Close TCMD. I can't say with certainty what will happen but I get zombie TCCs numbering anywhere from 0 (rare) to the number of extra tabs I created. It's a little harder, but I can also create zombies by making several new tabs with Alt-T-T as fast as I can. Of course, use the Alt key which is sent to TCMD.