HtmlDoc.GetTable error?

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I've tried this example from the Help file:
Macro Macro26

Code:

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out
HtmlDoc d.InitFromWeb("http://www.w3schools.com/html/html_tables.asp")
ARRAY(str) a
d.GetTable(8 a)

int i
for i 0 a.len 2
,out "%s=%s" a[i] a[i+1]
,

But I've got this error message:
Error (RT) in <open ":7737: /91">Macro26: object not found (table). <help #IDP_ERR>?

What's wrong with it?