<xsl:template match="/alldata">
 <alldata>
   <xsl:for-each-group select="*" group-starting-with="load">
     <load>
       <xsl:copy-of select="loadnum"/>
       <xsl:copy-of select="start"/>
       <xsl:copy-of select="stop"/>
       <xsl:copy-of select="current-group()[position() &gt; 1]" />
       <total><xsl:value-of select="sum(current-group()[position()
&gt; 1]/@cases)" /></total>
     </load>
   </xsl:for-each-group>
 </alldata>
</xsl:template>

>>   <total><xsl:value-of
>> select="sum(current-group()[self::po/@cases])"/></total>

>with:

><total>
>   <xsl:value-of
>        select="sum(current-group()[self::po]/@cases)"/>
></total>
>
OK. so I replaced that line but I still get the same error message
(FORG0001: Can not convert string "" to a double...)

--
Regards,
Mukul Gandhi