================================================================= = W A R N I N G = ================================================================= = Your project doesn't contain a header file specified as: = = ${maven.checkstyle.header.file} = Checkstyle needs it to check the existence of the License in = = your source files. If it can't find this file, it throws an = = error. = = A temporary solution is to create an empty LICENSE.txt file. = = Though, we recommend that you edit this License. = ================================================================= Using ${checkstyleProperties} for checkstyle ... ${context.getAntProject().getReferences().get('maven.compile.src.set')}