# Re: Problem using the javax.crypto lib on Win95

Jan Luehe (luehe@laguna.eng.sun.com)
Mon, 28 Sep 1998 11:00:18 -0700 (PDT)

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Mahadevan:

> I installed JDK 1.2 + JCE 12-beta1
> When I try to use the jar file I get the following error
>
> error:Invalid class file format: <jar file
> path>(javax/crypto/KeyGenerator.class), wrong version: 46, expected 45
> .. Class javax.crypto.Keygenerator not found
>
> What could be the problem here, did I download a bad jar file ?

This is a known problem and is being fixed.

JCE 1.2 beta1 was compiled with the latest "javac" version which
introduced a version number upgrade (which will be backed out again
before FCS). We are going to release another version of JCE 1.2 beta1
that was compiled with the compiler available in JDK 1.2 beta4
later today. This release will be named JCE 1.2 beta2.

Sorry about that.

Thanks,

Jan

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