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Home/ Questions/Q 6955253
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Editorial Team
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Editorial Team
Asked: May 27, 20262026-05-27T14:42:45+00:00 2026-05-27T14:42:45+00:00

I have downloaded java.sizeOf , but I am getting this exception. I am running

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I have downloaded java.sizeOf, but I am getting this exception. I am running from eclipse. What should I do?

Exception in thread "main" java.lang.IllegalStateException: Instrumentation is null
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  1. Editorial Team
    Editorial Team
    2026-05-27T14:42:46+00:00Added an answer on May 27, 2026 at 2:42 pm

    In eclipse, click on ‘run as’ -> Run Configurations.Go to second tab ‘Arguments’ and under ‘VM arguments’ add -javaagent:< path to>/SizeOf.jar

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