My JNI superpowers are rather limited and I haven't tested it against Sun's JRE, but the application is simple and is a subset of all the JNI helloworld apps out there. It appears as if JNI_CreateJavaVM succeeds, but returns garbage the second time and thus (*env)->FindClass() causes an access violation. To compile: \wingcc\bin\gcj -c HelloWorld.java \wingcc\bin\gcj -c jnitest.c \wingcc\bin\gcj -o helloworld jnitest.o HelloWorld.o Øyvind -------------- next part -------------- A non-text attachment was scrubbed... Name: HelloWorld.java Type: text/x-java Size: 30 bytes Desc: not available URL: <http://gcc.gnu.org/pipermail/java/attachments/20040119/7ab65d19/attachment.bin> -------------- next part -------------- A non-text attachment was scrubbed... Name: jnitest.c Type: text/x-c Size: 992 bytes Desc: not available URL: <http://gcc.gnu.org/pipermail/java/attachments/20040119/7ab65d19/attachment-0001.bin>