[xwiki-users] Warning: <iframe> escaping malformed URI reference

Hi all, im using this macro to include HTML file into my page #macro(displayppt $zipname $htmlname) #set ($url = $xwiki.zipexplorer.getFileLink($doc, "$zipname", "$htmlname")) <iframe src="$url" frameborder="0" scrolling="0" width="800" height="600"></iframe> #end It works but when I try to export my page in PDF the generated PDF doesn't contains the included file and in the console appears something like Warning: <iframe> escaping malformed URI reference. the URI /xwiki/bin/download/Discussione/MasterPlan/Piano%20Principale.zip/Piano Principale.htm is traslated in: file:/C:/workspace%2Dxwiki/apache%2Dtomcat%2D5.5.25/work/Catalina/localhost/xwiki/h5khbL0n/ Discussione.MasterPlan.Piano Principale.zip/Piano Principale.htm Regards Raffo