[Scilab-users] bug in function iir ?

[grivet]

Hello,
I am beginning to use digital filters to treat some data. As my first 
step, I try to run the examples in the help,how to design an elliptic 
filter (using Scilab 5.5.1, Win7-64). This works . However, when I 
select a Butterworth filter:
          hz = iir(Order,'lp','butt',Fcutoff/Fs/2,[0.1 0.1]);
I get this error message:

Singularité de la fonction log ou tan.
at line       6 of function dbphi called by :
[db_repf, phi_repf] = dbphi(repf);

What did I miss ?
No bugs have been reported for function dbphi, but three similar bugs 
are listed for iir.
Any suggestion welcome.
JPGrivet


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