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Re: Virtual Endpoint Exception in callback
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Re: Virtual Endpoint Exception in callback


  • Subject: Re: Virtual Endpoint Exception in callback
  • From: Bill Stewart <email@hidden>
  • Date: Wed, 16 Jul 2003 18:23:59 -0700

The only variable on line 93 of this is your callback that should field the input call... Have you added a non-null object to handle the input?

Ideally if you can file a bug and include the code I can take a look at this...

http://developer.apple.com/bugreporter

Thanks

Bill

On Wednesday, July 16, 2003, at 06:08 PM, email@hidden wrote:

(Sorry if this hits twice, I left the Subject: line out the first time.)

My first post, being new to the list:

I'm trying to create a midi filter application: read the input, pass it on or don't according to what's being filtered. I've gotten the basic idea to work using C++ but want to use Java.
From what I've seen, virtual endpoints (destinationCreate) are "seen" by MIDIsetup.getSource(), ports (inputPortCreate) are not. I need to use the virtual variety.
I'm getting the following error:

java.lang.NullPointerException
at com.apple.audio.midi.MIDIDispatcher.readProc(MIDIDispatcher.java:93)

when I send. Same behavior in 1.3.1 and 1.4.1. Again, the virtual endpoints work fine in C++.
Any ideas?
Thanks in advance.
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  • Follow-Ups:
    • Re: Virtual Endpoint Exception in callback
      • From: marc downie <email@hidden>
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