On applying service pack 11100, I get the following error: "Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file"
This error is due to the migration of JRE from version 1.5 to 1.6 in service pack 11040.
Solution 1: Shut down and start the Applications Manager product once and then apply the latest service pack.
Solution 2: Go to AppManagerHome\working\jre\jre1.6 to AppManagerHome\working\ location. After that restart Applications Manager once again and check the issue.