FOR_ITR_GP Con_Group doesn't iterate

["Joshua W. Brown" <jwbrown@artsci.wustl.edu>]

Hi All,

I am writing a new pdp++ module to add real-time simulation capabilities (e.g., 
to model certain electrophysiological cell types as a system of finite 
difference equations), and I can't get the FOR_ITR_GP() macro to iterate over a 
class instance derived from Con_Group.  It is as if the instance is empty, but 
I haven't been able to figure out how to fix it after days of trying and 
searching the pdp-discuss archives.  The code is at

    http://iac.wustl.edu/~jwbrown/rt

in rt.c line 147, RtUnitSpec::Compute_Net().  Any help will be greatly 
appreciated.

Thanks and Best,
Josh Brown
Dept. of Psychology
Washington Univeristy