User`s guide

New Features
3-7
Such models cannot be correctly simulated. Accordingly, Simulink now
displays an error message when you attempt to run or update a diagram
containing function-call cycles.
Simulink Debugger
This section describes enhancements to the Simulink debugger.
Enhancement to Sorted List Display
The Simulink debugger (sldebug) sorted list command, slist, now displays
the names of the S-functions residing inside S-function blocks.
Improved Messages in Accelerated Mode
The trace, break, zcbreak, nanbreak, and minor commands now indicate that
they are disabled when in accelerator mode and you need to switch to normal
mode to activate them. The spacing of several messages has been fixed so the
text aligns correctly.
Breakpoints on a Function-Call Subsystem
You can now put a break point on a function-call subsystem. Simulink breaks
when the subsystem is executed. In Release 12, entering the
quit command
while at a breakpoint within a function-call subsystem wouldn't always quit
the debugger. Now the
quit command ends the debugging session once the
initiating (calling) Stateflow chart or S-function finishes executing its time
step.
Displaying and Probing Virtual Blocks
The display and probe commands now work for virtual blocks.
Stepping Stateflow Charts
You can now step execution of a model into a Stateflow chart.