JMonkeyEngine

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An amazing 3D game development engine written in Java.

org.xml.sax.SAXParseException; The value of attribute “material” associated with an element type “null” must not contain the ‘<’ character.

When exporting a Google SketchUp model into OgreXML format using the SketchUp to Ogre Exporter, the plugin will output XML with material names using < and > characters.

In my case, a simple fix was to wrap these special characters in the Ruby source code, in ogre_export_1_2_0b9.rb (about line 426):

ogre_mat_name_fixed = ogre_mat.name.sub("<", "_lt").sub(">", "_gt")
	# out.print "      <submesh material = "#{ogre_mat.name}" usesharedvertices="false" "
	out.print "      <submesh material = "#{ogre_mat_name_fixed}" usesharedvertices="false" "

And likewise around line 116:

ogre_mat_name_fixed = @name.sub("<", "_lt").sub(">", "_gt")
		# s.print	"material #{@name}n" 
		s.print	"material #{ogre_mat_name_fixed}n"