Duplicate xsl:param name

The parameters of a template, a stylesheet function, or the stylesheet itself form one namespace: each must have a distinct @name. Two parameters sharing a name is a static error — the processor cannot tell which one a reference binds to — and rejects the stylesheet.

Incorrect:

<xsl:template name="render">
  <xsl:param name="size"/>
  <xsl:param name="size"/>
</xsl:template>

Correct:

<xsl:template name="render">
  <xsl:param name="width"/>
  <xsl:param name="height"/>
</xsl:template>