Assertion error using USB midi.

Hello,
I am trying the real time java for midi/sound. I am getting the following when I try to open my usb midi keyboard.
java: ../../../src/rawmidi/rawmidi.c:264: snd_rawmidi_open_conf: Assertion `err >= 0' failed.
Aborted (core dumped)
Setup is linux ubuntu 7.10 with the rt kernel
java version "1.5.0_13"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_13_JavaRTS-2.1_EA-nb021_RTSJ-1.0.2)
Java Real-Time System HotSpot(TM) Client VM (build 1.5.0_13, mixed mode)
Kernel 2.6.22-14-rt #1 SMP PREEMPT RT Tue Feb 12 03:54:33 UTC 2008 x86_64 GNU/Linux
Is this a bug ?
cheers Paul.

Hi David,
Thanks for your reply,
rawmidi.c is part of the alsa-lib .
I am using the latest alsa-lib-1.0.16 and alsa-driver-1.0.16
http://alsa.cvs.sourceforge.net/alsa/alsa-lib/src/rawmidi/rawmidi.c?view=markup
putting strace before the java command gives some more info.
[snip lots of stuff]
java: ../../../src/rawmidi/rawmidi.c:264: snd_rawmidi_open_conf: Assertion `err >= 0' failed.
) = ? ERESTART_RESTARTBLOCK (To be restarted)
+++ killed by SIGABRT (core dumped) +++
It happens when you try to open the midi input device.
The code works fine with a plain 64bit VM.
java -version
java version "1.6.0_03"
Java(TM) SE Runtime Environment (build 1.6.0_03-b05)
Java HotSpot(TM) 64-Bit Server VM (build 1.6.0_03-b05, mixed mode)
The java realtime works great for low latency audio (compared to plain java) it would be great to get my keyboard working!
cheers Paul.

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