rlocus for version Octave 9.4

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I have a problem. rlocus doesn't function.
after running rlocus, I receive the following

pkg load control
clear, close, clc
s=3Dtf('s')
W=3D1/(s^3+2*s^2+s+1)
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
rlocus (g)
error: roots: inputs must not contain Inf or NaN
error: called from
    roots at line 90 column 5
    rlocus at line 175 column 23
Thank you
--=20

--------------------------------------------------------
Prof.Dr.G=C3=ABzim Karapici
Mobile: +355 69 20 57 750

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<div dir=3D"ltr"><div>I have a problem. rlocus doesn&#39;t function.</div><=
div>after running=C2=A0rlocus, I receive the following</div><div><br></div>=
<div><font color=3D"#0000ff" size=3D"4">pkg load control<br>clear, close, c=
lc<br>s=3Dtf(&#39;s&#39;)<br>W=3D1/(s^3+2*s^2+s+1)</font><br>=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</div><div><=
font color=3D"#0000ff" size=3D"4">rlocus (g)<br>error: roots: inputs must n=
ot contain Inf or NaN<br>error: called from<br>=C2=A0 =C2=A0 roots at line =
90 column 5<br>=C2=A0 =C2=A0 rlocus at line 175 column 23</font></div><div>=
Thank you</div><span class=3D"gmail_signature_prefix">-- </span><br><div di=
r=3D"ltr" class=3D"gmail_signature" data-smartmail=3D"gmail_signature"><div=
 dir=3D"ltr"><div><div dir=3D"ltr"><br>------------------------------------=
--------------------<br>Prof.Dr.G=C3=ABzim Karapici<br><font face=3D"Arial"=
 size=3D"2"><span style=3D"font-family:Arial;font-size:10pt">Mobile: +355 6=
9 20 57 750</span></font><br><br></div></div></div></div></div>

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