Hi, Sorry for the delay. When I compile with gcj 4.1 and then run with gij-4.1, I get the error. If I run the same class file with gij-4.2, everything's OK. It looks like the issue is (or was) in the classpath libs, in java/util/Calendar.java. The gcj4.2-src source package has some extra statements in the setTimeZone method compared to gcj-src that (to me) seem to make the difference. Cheers Jan-Pascal