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This is a sub-class of the LinkageError class and indicates that the JVM cannot find an appropriate native-language definition of a method declared as native. Compile a 64-bit version of your .dylib file.
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java.lang.UnsatisfiedLinkError: /opt/sun/webserver7/lib/libadminsecurity.so: Can't load AMD 64-bit .so on a AMD 64-bit platform
at java.lang.ClassLoader$NativeLibrary.load(Native Method)