{hostname}123%> xsltproc -v -o output.xml transform.xsl input.xml
creating dictionary for stylesheet
reusing dictionary from transform.xsl for stylesheet
Added namespace: xsl mapped to http://www.w3.org/1999/XSL/Transform
Segmentation fault

Sorry for being so dense on this. Thanks.
- Rob

--On Tuesday, February 06, 2007 16:40:58 -0800 Rob Newman wrote:

You have got the point - your summary is correct.
Unfortunately that first sort (1) causes xsltproc to seg-fault again. I
will keep trying to figure it out.

This, which incorporates Abel's suggestions and a wrapper to handle the example input, works for me with xsltproc on Linux giving the result you are looking for with the larger example as input.

<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/ Transform">

<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>

<xsl:template match="/">

<dataloggerlist>
<xsl:apply-templates select="pfarr/pfarr/pfarr">
<xsl:sort select="pfstring[@name = 'dlt']" data- type="number" order="descending"/>
<xsl:sort select="@name"/>
</xsl:apply-templates>
</dataloggerlist>
</xsl:template>

   <xsl:template match="pfarr">
       <datalogger name="{@name}">
           <xsl:apply-templates select="pfstring"/>
       </datalogger>
   </xsl:template>

   <xsl:template match="pfstring">
       <param id="{@name}">
           <xsl:value-of select="."/>
       </param>
   </xsl:template>

</xsl:stylesheet>