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MaxMSP 5 – MXJ on Snow Leopard 10.6.3 (problems with MaxSystem.* commands)


Christopher Baker
Apr 23 2010 | 6:11 pm

Hi there,

I am having some strange issues with MXJ since upgrading to Snow Leopard. Basically, almost any static calls to MaxSystem.* simply never complete, and give no error messages on the Console.app or in the max window. I’ve tried to catch exceptions and just can’t find anything.

I re-installed Java 1.5 (per these instructions http://chxor.chxo.com/post/183013153/installing-java-1-5-on-snow-leopard) and have tried the programs on 1.5 and 1.6.

The example program runs fine on 4.6 (which is still on my machine). It runs fine on MaxMSP 5 on windows. It runs fine on MaxMSP 5 on OS X 10.5.8.

It just won’t run on 10.6.3!

I’m beginning to wonder if there is some issue with MXJ JNI calls? Perhaps there is a 32/64 bit problem with the JNI library?

Anyway, I am enclosing the source, class, maxpatch 4.6 and 5.0 files for your testing. If you are on Snow Leopard could you try it out?

Thanks,
Christopher

Attachments:
  1. MXJ-Problems.zip

Christopher Baker
Apr 23 2010 | 8:22 pm

So I just tried this on another Snow Leopard machine and it seemed to work. Can anyone think of any reasons why the MaxSystem.* calls wouldn’t be working on my machine?


Christopher Baker
Apr 23 2010 | 9:23 pm

Another update — after configuring the mxj JVM to output like

max.jvm.option -Xdebug
max.jvm.option -Xnoagent
max.jvm.option -Xrunjdwp:transport=dt_socket,address=8074,server=y,suspend=n
max.jvm.option -XX:-UseSharedSpaces

and connecting to the the output via:

jdb -attach 8074

it reveals that:

none:~ bakercp$ jdb -attach 8074
Set uncaught java.lang.Throwable
Set deferred uncaught java.lang.Throwable
Initializing jdb …
>
Exception occurred: java.lang.UnsatisfiedLinkError (uncaught)"thread=AWT-AppKit", com.cycling74.max.MaxSystem.locateFile(), line=-1 bci=-1

AWT-AppKit[1]

—-

etc etc.

Any tips? I get unsatisfied link errors on all "native" java calls within the max.jar.


Christopher Baker
Apr 25 2010 | 4:56 am

Well, I finally solved it. Turns out that a copy of the 4.6 max.jar and jitter.jar were in the /Library/java/Extensions folder. No idea how they got there, but they were the culprit. Thanks to JKC for the tips.

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