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From: George Woodrow III on 26 Oct 2009 00:27
I am using a similar setup to you, except that the computer I tested
with is an iMac.

I had one freeze when trying to access Mathematica > About Mathematica
> System Information.

However, after a force quit, I could not reproduce the problem, nor
would it appear on my macBook Pro.

I have seen no problem trying to open notebooks at all.

I saw a problem or two right after installing Snow Leopard, but after
starting Mathematica with the option key held down, the weirdness went
away -- except with the sole instance of the problem you report as
noted above.

I had a similar issue with the beta 4 for Workbench, but re-insalling
the app fixed that problem. The error messages pointed to a Java
exception.

I have no doubt that there is something going on -- probably with the
Java libraries -- and I am hoping that the upcoming 10.6.2 update will
resolve many of them. (I see on other geeky mac forums that there are
issues with Java under Snow Leopard, but I don't recall the details.)
If this does not fix the problem, perhaps Wolfram will figure out what
is going on and issue a patch.

george

On Oct 24, 2009, at 2:37 AM, Fred Klingener wrote:

> On Oct 21, 6:30 am, keven <keven...(a)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.
>
> ...
>
> I've had persistent problems with Mathematica 7.0.1 since I installed
> Snow Leopard, and they present in several ways that strongly suggest a
> problem with Java.
>
> 1.) The simplest manifestation is seen by opening Mathematica,
> clicking Mathematica > About Mathematica > System Information.
>
> a.) If my MacBook Pro is connected to the internet, the query
> times out in two stages. First, "The kernel is not responding...",
> then "One or more dynamic objects..."
>
> b.) If I disconnect from the internet, the System Information
> panels appear correctly.
>
> 2.) The internet dependence is mirrored in entries from a MathKernel
> console.
>
> a.) Connected to the internet, I get
>
> In[1]:= <<Jlink`
>
> In[2]:= InstallJava[]
> Intentionally suppressing recursive invocation exception!
> java.lang.IllegalStateException: recursive invocation
> at java.lang.ClassLoader.initSystemClassLoader(ClassLoader.java:1391)
> at java.lang.ClassLoader.getSystemClassLoader(ClassLoader.java:1374)
> ...
>
> b.) Disconnected from the internet, I get
>
> In[4]:= <<JLink`
>
> In[5]:= InstallJava[]
>
> Out[5]= LinkObject['/Applications/Mathematica-7.0.1.app/
> SystemFiles/Links/JLi\
> nk/JLink.app/Contents/MacOS/JavaApplicationStub' -init\
> "/tmp/m00000119351", 1, 1]
>
> Executions of those two commands from the front end appear to
> proceed successfully, independent of the state of the internet
> connection.
>
> 3.) In attempting normal use of Mathematica, opening notebooks created
> under Leopard often but not always leads to a hang ("not
> responding...) that can be cleared only by Force Quit. Such notebooks
> can often be successfully rebuilt with Import[filename.nb,
> "NotebookObject"]. An attempt to load JLink User Guide, for example,
> ends in Force Quit.
>
>
> Changing the Mathematica mode between 32 and 64-bit has no detectable
> effect.
>
> I've been corresponding with Mathematica Service about this, but we
> haven't been able to pinpoint the crux. Any new ideas here?
>
> Mathematica 7.0.1
> MacBook Pro 2.6 GHz Core 2 Duo
> OSX 10.6.1 (Snow Leopard)
>
> TIA,
> Fred Klingener
>


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