Plugins can certainly cause other plugins to be loaded, and indeed you can make
a plugin unload itself if another that it depends upon is unloaded. For example
the BalloonEngine (B2DPlugin) loads the BitBltPlugin if it is not already
loaded. If theBitBLtPlugin is unloaded, the B2DPlugin unloads. See
BalloonEngineBase (in the VMMaker package) #initialiseModule and
#moduleUnloaded:

Can't help with the details of the PseudoTTY plugin or the AsynchFilePlugin
since I don't use them.


tim
--
Tim Rowledge, tim at rowledge.org, http://www.rowledge.org/tim
Useful random insult:- Full of wisdumb.