emmatool - 2012-09-19

I am getting  java.io.UTFDataFormatException: malformed input around byte 145 exception while generating report from coverage.ec and coverage.em

jdk version  : ibm jdk 1.6
emma-maven-plugin-verion - 1.0-alpha-3
emma jar version - 2.0.5312

I have deployed the application in tomcat to get the run time code coverage,

Any help related to issue is appreciated.