Message about UnsupportedClassVersionError

If you get a message similar to this:

WARN - BUILD FAILED

WARN - java.lang.UnsupportedClassVersionError: com/klocwork/kwant/KWJavac (Unsupported major.minor version 49.0)

you are using an unsupported version of Ant or Java. For information about the prerequisites for using kwant, see Creating a Java build specification.