User`s guide

3 Simulink 4.1 Release Notes
3-10
Bug Fixes
This section lists fixes to bugs that occurred in the previous version of
Simulink.
•Variable sample time S-functions
Simulink no longer crashes when an S-function with variable sample time is
placed in an atomic subsystem.
•Bus selector detection of duplicated names
A bug related to the detection of a duplicated name in a bus that was feeding
a Bus Selector block was fixed.
•Optimize block memory use
In Simulink 4.0, the Continuous and Discrete Transfer Function blocks and
the Discrete Filter block used more memory than they needed to,
particularly for the case of many poles. They now use an optimal amount of
memory.
•Miscellaneous fixes to the model loader
Miscellaneous bug fixes have been performed on the model loader:
- The loader and saver now retain any comment lines (i.e., lines that begin
with #) that are found at the top of the model file.
- The loader does not crash on Windows NT when file sizes are integer
multiples of 4096.
- The loader does not hang on corrupt models in which blocks with duplicate
names are found.
•Profiler fixes
The Simulink profiler now saves its files in the temporary directory. See the
MATLAB command
tempdir. The help was also updated.
•Chirp block fix
The Chirp block now sweeps through frequencies correctly from the initial
frequency at the simulation start time to the target frequency at the target
time.
•Function-call subsystem bug fixes
This version fixes several bugs related to the execution orders of function-call
subsystems.