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You also have to remember that to run 64-bit applications, you must specify the -d64 flag. Otherwise your app will run in 32-bit mode!

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AFAIK -d32 was the default on some versions of Solaris, but -d64 is the default now. Windows doesn't support these options. Linux does support -d32 but it has to be installed seperately, otherwise -d64 is the default for a 64-bit JVM.

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