RE: Setting name attribute of <xsl:attribute>

Hey Darren,

You need to wrap the "attributeName" xsl:with-param select value within
ticks or a string() function call.

What's happening is that the parser is looking for an element within the
given context named Parcel_Sequence_number, and obviously doesn't find one
... so, an empty/null node-list is passed in as the arguement.

Try this:
    <xsl:template match="/ShipmentParcelEvent">
        <xsl:element name="ShipmentParcelEvent">
            <xsl:element name="Parcel">            
                <xsl:call-template name="checkAttributeNotNull">
               <xsl:with-param name="attributeName" 
 
select="'Parcel_Sequence_number'"/> <!-- Here's the change -->
                   <xsl:with-param name="attributeValue" 
 
select="./Parcel/@Parcel_Sequence_Number"/>
                </xsl:call-template>

                etc etc etc  

            </xsl:element> 
        </xsl:element> 
    </xsl:template> 

HTH,
Jeff

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