James, I worry a little about this statement from the Java API documentation for class Class: "Class has no public constructor. Instead Class objects are constructed automatically by the Java Virtual Machine as classes are loaded and by calls to the defineClass method in the class loader." So, what calling syntax are you using to "construct a java.lang.Class Object" in your IDL code? I.e., how are you instantiating this 'jClass' object? James Jones

For anyone who's interested, I found a solution that works for me. It seems that Class.forName() is not using the correct ClassLoader, specifically not a ClassLoader that uses the classpath. This is explained here: http://www.theserverside....sForname/DynLoad.pdf The short version of the solution, without all the usual housekeeping and error catching, is as follows: jClass = obj_new('IDLjavaObject$Static$JAVA_LANG_CLASS', 'java.lang.Class') jClassLoader = obj_new('IDLjavaObject$Static$JAVA_LANG_CLASSLOADER', 'java.lang.ClassLoader') jSystemClassLoader = jClassLoader->getSystemClassLoader() jClass->forName, 'ClassName', 0, jSystemClassLoader Hardly the epitome of elegance but it does work regards James