Message printing is giving 500 - Internal server error

This is a log output when I try to print e-mail from zimbra web client


2012-09-17 17:58:53,841 WARN [btpool0-697://myhostname/zimbra/h/printmessage?id=19022&xim=1] [] log - /zimbra/h/printmessage: java.io.FileNotFoundException: no such file: /opt/zimbra/jetty-6.1.22.z6/work/zimbra/jsp/org/apache/jsp/tag/web/message/attachments_tag.class


any help?