I suspect you're making a common mistake: you're showing us the part of the
code where you think the bug is, but it's actually somewhere else. Try to
produce a complete stylesheet and source document that demonstrate the
problem. (Often the exercise of doing this locates the bug anyway).

Incidentally, as we tell people most days, 

> <xsl:variable name="soldplan">
>   <xsl:value-of select="$InputNodes[@AttrName='Selected H Plan']"/>
> </xsl:variable>

is a very longwinded and inefficient way of writing

> <xsl:variable name="soldplan" select="$InputNodes[@AttrName='Selected H
Plan']"/>

Michael Kay
http://www.saxonica.com/