Can not convert #RTREEFRAG to a NodeList!

Given an xsl with

<xsl:call-template name="tSheet">

<xsl:with-param name="headers">

<header>some</header>

<header>some more</header>

</xsl:with-param>

</xsl:call-template>

<xsl:template name="tSheet">

<xsl:param name="headers"/>

<xsl:for-each select="$headers/header">

<b>

<xsl:value-of select="."/>

</b>

</xsl:for-each>

</xsl:call-template>

</xsl:template>

Xalan reports error: Can not convert #RTREEFRAG to a NodeList!

At the same time <xsl:copy-of select="$headers" /> gives
<header>...</header>. I beleive there is no difference between TreeFragment
and NodeSet or did I miss something ???




 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list