Question on syntax error on Xalan that works on MSXML

[Maya Widyasari]

Hi,   I am trying to run this code in Xalan 1.7, but I keep getting error: XSLT error: The variable 'ActiveBO' is not defined, source tree node: FIELD (file:///D:\OnDemandXSLT\Step1.xsl, line 178, column 174). However, this is working fine in MSXML.   Any tips or pointer?   <xsl:template match="TEST/OPERATION/FIELDS/FIELD" mode="GetErrorFieldRule">  <xsl:param name="ActiveBO"/>  <xsl:param name="ActiveBC"/>    <xsl:variable name="ErrorField">   <xsl:apply-templates select="$RuleSet//[EMAIL PROTECTED] = 'CreateErrorNotification']/[EMAIL PROTECTED] = $ActiveBO]/[EMAIL PROTECTED] = $ActiveBC]/SRCFIELDS/SRCFIELD" mode="GetSrcField">    <xsl:with-param name="Field"><xsl:value-of select="@Name"/></xsl:with-param>   </xsl:apply-templates>  </xsl:variable>    <xsl:value-of select="count(msxsl:node-set($ErrorField)//SRCFIELD)"/> </xsl:template> Any help will be appreaciated, this is my first day learning XSLT.   Thank you   Maya