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Re: JLink broken on Snow Leopard

• To: mathgroup at smc.vnet.net
• Subject: [mg104193] Re: JLink broken on Snow Leopard
• From: keven <kevenlin at gmail.com>
• Date: Thu, 22 Oct 2009 22:33:51 -0400 (EDT)
• References: <hbmnsh$jjv$1@smc.vnet.net> <hbou2d$lhl$1@smc.vnet.net>

On Oct 21, 11:28 pm, fd <fdi... at gmail.com> wrote:
> On Oct 21, 9:30 pm, keven <keven... at gmail.com> wrote:
>
>
>
>
>
> > Hi,
>
> > I have written an app that connects to Mathematica kernel via JLink.
> > The app no longer worked after I upgraded to Snow Leopard.  Running
> > the JLink SampleProgram returns following error:
>
> > Fatal error: cannot find the required native library named
> > JLinkNativeLibrary.
> > Exception in thread "main" java.lang.UnsatisfiedLinkError:
> > com.wolfram.jlink.NativeLink.MLOpen(I[Ljava/lang/String;[Ljava/lang/
> > String;)J
> >         at com.wolfram.jlink.NativeLink.MLOpen(Native Method)
> >         at com.wolfram.jlink.NativeLink.<init>(Unknown Source)
> >         at com.wolfram.jlink.MathLinkFactory.createMathLink0(Un=
kn=
> own Source)
> >         at com.wolfram.jlink.MathLinkFactory.createMathLink(Unk=
no=
> wn Source)
> >         at com.wolfram.jlink.MathLinkFactory.createKernelLink0(=
Un=
> known
> > Source)
> >         at com.wolfram.jlink.MathLinkFactory.createKernelLink(U=
nk=
> nown Source)
> >         at SampleProgram.main(Unknown Source)
>
> > It seems that libJLinkNativeLibrary.jnilib needs to be recompiled for
> > Snow Leopard?
>
> > Thanks,
>
> > Keven
>
> Hi there..
>
> I experienced some problems with snow leopard as well, and found that
> changing the java VM from 64 to 32 provided a solution.
>
> Go to Applications --> utilities --> java preferences and change it to
> 32 bits and see if it works..
>
> Good luck

It seemed that the problem was JLink could not find 64-bit version of
libJLinkNativeLibrary.jnilib.  The problem was solve by running the
app using 32-bit JVM.