SAXParseException when print the pdf from xslt and xml

I am trying to generate pdf from xml and xslt.

[Fatal Error] :89:14: Invalid byte 1 of 1-byte UTF-8 sequence.
file:////; Line #89; Column #14; org.xml.sax.SAXParseException; systemId: file:////; lineNumber: 89; columnNumber: 14; Invalid byte 1 of 1-byte UTF-8 sequence.

severe:XSLT Transformation failed null

JBAS014134: EJB Invocation failed on component PDFGenerationBean for method public abstract java.util.List au.com.copl.dbaccesslayer.session.PDFGenerationRemote.getPDFs(java.util.List,java.util.List,java.lang.Integer,java.lang.Integer) throws java.lang.Exception: javax.ejb.EJBException: java.lang.RuntimeException: java.lang.NullPointerException