Found a solution, by placing the resin.jar in the \jre\lib\endorsed directory.

I can't get the oxygenxml eclipse plugin (6.1.0) to use Resin's XSLT (compiled stylesheet transformation). I have read the HowToConfigureExternalXSLTTransformer.pdf. I set the JAXP XSLT Transformer value as: com.caucho.xsl.Xsl placing the resin.jar in the plugin lib directory. And config the transfo...