Zero Crossing with Debugger

[Terence]

I'm having some trouble with the zero crossing feature in the
debugger. When I run it, all I get is something like this:

[Tm = 1.530861103895891 ] NewCTC.zc.SearchLoop
(sldebug @2611):
ZeroCrossing Events detected. Interrupting model execution
%----------------------------------------------------------------%
[Tm = 2 ] NewCTC.zc.SearchLoop
(sldebug @2611):
%----------------------------------------------------------------%
[Tm = 1.53086110390028 ] NewCTC.zc.SearchLoop
(sldebug @2611):
ZeroCrossing Events detected. Interrupting model execution
%----------------------------------------------------------------%
[Tm = 123 ] NewCTC.zc.SearchLoop
(sldebug @2611):
%----------------------------------------------------------------%
[Tm = 122.4319797537079 ] NewCTC.zc.SearchLoop
(sldebug @2611):
ZeroCrossing Events detected. Interrupting model execution
%----------------------------------------------------------------%
[Tm = 219 ] NewCTC.zc.SearchLoop
(sldebug @2611):

It doens't seem to have any information about the location of the
block responsible for the zero crossing. Why not? In the help
section, they get the output:

[Tz = 0.2 ] [Hz = 0 ]
Detected 2 Zero Crossing Events 0:5:1R, 0:5:2R
%--------------------------------------------------------------
%
[Tm = 0.4 ] zeroxing.ZeroCrossingDetectionLoop
(sldebug @45):

This has the 0:5:1R and 0:5:2R, which I believe specifies the
location somehow?

Thanks,
  Terence