[xsl] Type error? Too many items?

[Owen Blacker <owen@xxxxxxxxxxxxx>]

I'm developing using Altova XMLSpy 2006 Visual Studio .NET Edition (rel 
3 SP1) and my XSLT is complaining about "Type error, value does not 
match a required type as specified by the matching rules in 2.5.4 
SequenceType Matching. - 'node()'", yet if I put a watch on the 
XPaths "." and "../*", they are exactly the types I'd expect (a node() 
and a node()* of length ~20), if I set a breakpoint at the 
xsl:call-template statement.

Then, if I remove the as attributes on the xsl:with-param elements, it 
tells me "Too many items" on the xsl:if.  I really can't see what's 
going on here.

Any suggestions greatfully received!


Owen

XSLT excerpts:

<xsl:call-template name="module-bodies">
   <xsl:with-param name="current-position"
      select="foo:index-of-node(., ../*)"/>
   <xsl:with-param name="future-position"
      select="foo:index-of-node(following-sibling::h3, ../*)"/>
</xsl:call-template>

...

<xsl:function name="foo:index-of-node" as="xs:integer*">
   <xsl:param name="srch" as="node()"/>
   <xsl:param name="sequence" as="node()*"/>

   <xsl:for-each select="$sequence">
      <xsl:if test=". is $srch">
         <xsl:sequence select="position()"/>
      </xsl:if>
   </xsl:for-each>
</xsl:function>

XML:

<div>
   <h3> ... </h3>
   <p> ... </p>
   <p> ... </p>

   <h3> ... </h3>
   <p> ... </p>
   <p> ... </p>

   <!-- etc --->
</div>

--
Owen Blacker, London GB
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