mxOption(m1, key="Number of Threads")
Both fail (no value, no key errors, respectively)
It would be nice if asking for a key returned its value, and asking about a model returned the currently active options
Yeah, that's a common user interface idiom. SVN 3386
The current way to get Options is
model@options # show the model options
options()$mxOptions # list all mxOptions (global settings)
These are given on the help page for mxOption. The same place you'd go to set the options, tells you how to get them.