question about nodeset extension

[Michel GOOSSENS]

I am trying to use the nodeset extension with xalan 2.2, but although I 
(think I) have included all possible jar files in my CLASSPATH, I always 
get the message

(Location of error unknown)XSLT Error 
(javax.xml.transform.TransformerException): 
java.lang.NoSuchMethodException: For extension function, could not find 
method 
org.apache.xml.dtm.ref.DTMNodeIterator.nodeset([ExpressionContext,] ).

Hence my question, in which of the jar files is the nodeset extension 
defined.

My XSL code to trnasform an RTF into a node-set uses the following:

<xsl:stylesheet
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
  xmlns:xalan="http://xml.apache.org/xslt";
  extension-element-prefixes="xalan"
  version="1.0"
 >

.....

<xsl:template name="getchars-xalan">

<!-- First pass over the data: store chars in chars-rtf -->
  <xsl:variable name="chars-rtf">
   <xsl:element name="fontlist">
    <xsl:apply-templates select="g[@style]" mode="getchars"/>
   </xsl:element>
  </xsl:variable>

  <xsl:text> +++ begin chars-rtf &#xA;</xsl:text>
    <xsl:for-each select="xalan:nodeset($chars-rtf)//char">
      <xsl:value-of select="name(.)"/>
  <xsl:text> </xsl:text>
      <xsl:value-of select="name(attribute::*[1])"/>
  <xsl:text>&#xA;</xsl:text>
    </xsl:for-each>
  <xsl:text> +++ end chars-rtf &#xA;</xsl:text>

...

Thanks for your help. mg

PS:

Here is the contents of my CLASSPATH variable     
(/afs/cern.ch/sw/XML/cdrom/xml.apache.org/xalan-j_2_2_0/bin/ is where 
all jar files reside), I have edited the list by inlcuding linefeeds to 
make it more readable

 CLASSPATH =
/afs/cern.ch/sw/XML/cdrom/xml.apache.org/xalan-j_2_2_0/bin/xerces.jar:
/afs/cern.ch/sw/XML/cdrom/xml.apache.org/xalan-j_2_2_0/bin/xalan.jar:
/afs/cern.ch/sw/XML/cdrom/xml.apache.org/xalan-j_2_2_0/bin/xalansamples.jar:
/afs/cern.ch/sw/XML/cdrom/xml.apache.org/xalan-j_2_2_0/bin/xalanservlet.jar:
/afs/cern.ch/sw/XML/cdrom/xml.apache.org/xalan-j_2_2_0/bin/bsf.jar:
/afs/cern.ch/sw/XML/cdrom/xml.apache.org/xalan-j_2_2_0/bin/xsltc.jar:
/afs/cern.ch/sw/XML/cdrom/xml.apache.org/xalan-j_2_2_0/bin/BCEL.jar:
/afs/cern.ch/sw/XML/cdrom/xml.apache.org/xalan-j_2_2_0/bin/java_cup.jar:
/afs/cern.ch/sw/XML/cdrom/xml.apache.org/xalan-j_2_2_0/bin/xml-apis.jar:
/afs/cern.ch/sw/XML/cdrom/xml.apache.org/xalan-j_2_2_0/bin/JLex.jar:
/afs/cern.ch/sw/XML/cdrom/xml.apache.org/xalan-j_2_2_0/bin/runtime.jar: