xsl:if test for null string giving TransformerException

[Robert Kattke]

I'm getting a TransformerException when running Tomcat and calling a Servlet that use XML to create DOM and XSL to create webpage.

I'm posting just the snippet of XSL code and the Error here. Full listing should be in my next thread. Funny thing is from a command line I can run Process without an error. Why would Tomcat hiccup and belch ? Maybe I should be investigating my JARs in the classpath ?
*** note error occurring in ln 65 ***

<xsl:choose>
65 <xsl:when test="site = ''">
<xsl:text>N/A</xsl:text>
</xsl:when>
<xsltherwise>
<a>
<xsl:attribute name="href">
<xsl:value-of select="site"/>
</xsl:attribute>Website
</a>
</xsltherwise>

</xsl:choose>

; SystemID: ; Line#: 65; Column#: 34
javax.xml.transform.TransformerException: Unknown error in XPath at org.apache.xpath.XPath.bool(XPath.java:411) at org.apache.xalan.templates.ElemChoose.execute(ElemChoose.java:162) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2182)at .... xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:678)
...

....
....
....

at org.apache.xpath.objects.XNodeSet.compare(XNodeSet.java:619) at org.apache.xpath.objects.XNodeSet.equals(XNodeSet.java:706) at org.apache.xpath.operations.Equals.operate(Equals.java:82) at org.apache.xpath.operations.Operation.execute(Operation.java:146) at org.apache.xpath.Expression.bool(Expression.java:208) at org.apache.xpath.XPath.bool(XPath.java:388)
... 66 more

 

[Robert Kattke]

I'm getting a TransformerException when running Tomcat and calling a

Servlet that use XML to create DOM and XSL to create webpage. 65 <xsl:when test="site = ''"> Error on this line

Also tried this variation
<xsl:when test="string-length(site) > 0">

still getting:
; SystemID: ; Line#: 65; Column#: 48
javax.xml.transform.TransformerException: Unknown error in XPath

Help - something must not be configured right on my system.

 

[Robert Kattke]

Help - something must not be configured right on my system.

How would I check what actual jar's are being used by Tomcat 4.0.4 on WXP ? I'm assumming check my master environment variables and then analyze the batch files ( possibly using echo to see the classpath ).