DITAOT 1.4.2 and not resolved links to external PDF-s

Hi,

I'm trying to publish DITA-map to PDF using DITAOT and RenderX - just a standard full installation, but my pdf-document inserted via <xref> doesn't appear in the final PDF - it wasn't copied into the OUT folder at all. Does anybody know is it possible to use cross-references to external pdfs just editing some settins; or xlst-s should be changed? Does DITAOT support external PDF-s in PDF-output?

Thanks,

Alex 

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