MATLAB Central Newsreader - Java Error

Java Error

David Doria — Wed, 17 Oct 2007 14:17:07 -0400

Anytime I do something with a figure, i get this error:

java.lang.NullPointerException
at
com.mathworks.jmi.bean.MatlabBeanInterface.addCallback(MatlabBeanInterface.java:680)
at
com.mathworks.jmi.bean.MatlabCallbackInterface.addCallback(MatlabCallbackInterface.java:128)

but everything works fine! I can continue doing whatever I
was doing without even a hiccup, but i just get that error
printed a million times in my command window.

Whats up with that?

Thanks,
David

ps i'm on fedora 7 with
Java 1.6.0_03 with Sun Microsystems Inc. Java HotSpot(TM)
Client VM mixed mode, sharing

Re: Java Error

David Doria — Thu, 18 Oct 2007 17:45:03 -0400

Anyone know about this type of problem?

"David Doria" <daviddoria@gmail.com> wrote in message
<ff55h3$468$1@fred.mathworks.com>...
> Anytime I do something with a figure, i get this error:
>
> java.lang.NullPointerException
> at
>
com.mathworks.jmi.bean.MatlabBeanInterface.addCallback(MatlabBeanInterface.java:680)
> at
>
com.mathworks.jmi.bean.MatlabCallbackInterface.addCallback(MatlabCallbackInterface.java:128)
>
> but everything works fine! I can continue doing whatever I
> was doing without even a hiccup, but i just get that error
> printed a million times in my command window.
>
> Whats up with that?
>
> Thanks,
> David
>
> ps i'm on fedora 7 with
> Java 1.6.0_03 with Sun Microsystems Inc. Java HotSpot(TM)
> Client VM mixed mode, sharing

Re: Java Error

David Doria — Mon, 22 Oct 2007 16:43:56 -0400

Still getting this:

java.lang.NullPointerException
at
com.mathworks.jmi.bean.MatlabBeanInterface.addCallback(MatlabBeanInterface.java:680)
at
com.mathworks.jmi.bean.MatlabCallbackInterface.addCallback(MatlabCallbackInterface.java:128)
java.lang.NullPointerException

just so weird because it works fine...

Any thoughts?

"David Doria" <daviddoria@gmail.com> wrote in message
<ff862v$big$1@fred.mathworks.com>...
> Anyone know about this type of problem?
>
>
> "David Doria" <daviddoria@gmail.com> wrote in message
> <ff55h3$468$1@fred.mathworks.com>...
> > Anytime I do something with a figure, i get this error:
> >
> > java.lang.NullPointerException
> > at
> >
>
com.mathworks.jmi.bean.MatlabBeanInterface.addCallback(MatlabBeanInterface.java:680)
> > at
> >
>
com.mathworks.jmi.bean.MatlabCallbackInterface.addCallback(MatlabCallbackInterface.java:128)
> >
> > but everything works fine! I can continue doing whatever I
> > was doing without even a hiccup, but i just get that error
> > printed a million times in my command window.
> >
> > Whats up with that?
> >
> > Thanks,
> > David
> >
> > ps i'm on fedora 7 with
> > Java 1.6.0_03 with Sun Microsystems Inc. Java HotSpot(TM)
> > Client VM mixed mode, sharing
>

Re: Java Error

David Doria — Fri, 02 Nov 2007 00:56:15 -0400

Hmm it seems to be a problem when I move a window to my
second monitor. Is this not a known issue or something?

"David Doria" <daviddoria@gmail.com> wrote in message
<ffik0c$i3c$1@fred.mathworks.com>...
> Still getting this:
>
> java.lang.NullPointerException
> at
>
com.mathworks.jmi.bean.MatlabBeanInterface.addCallback(MatlabBeanInterface.java:680)
> at
>
com.mathworks.jmi.bean.MatlabCallbackInterface.addCallback(MatlabCallbackInterface.java:128)
> java.lang.NullPointerException
>
> just so weird because it works fine...
>
> Any thoughts?
>
>
> "David Doria" <daviddoria@gmail.com> wrote in message
> <ff862v$big$1@fred.mathworks.com>...
> > Anyone know about this type of problem?
> >
> >
> > "David Doria" <daviddoria@gmail.com> wrote in message
> > <ff55h3$468$1@fred.mathworks.com>...
> > > Anytime I do something with a figure, i get this error:
> > >
> > > java.lang.NullPointerException
> > > at
> > >
> >
>
com.mathworks.jmi.bean.MatlabBeanInterface.addCallback(MatlabBeanInterface.java:680)
> > > at
> > >
> >
>
com.mathworks.jmi.bean.MatlabCallbackInterface.addCallback(MatlabCallbackInterface.java:128)
> > >
> > > but everything works fine! I can continue doing whatever I
> > > was doing without even a hiccup, but i just get that error
> > > printed a million times in my command window.
> > >
> > > Whats up with that?
> > >
> > > Thanks,
> > > David
> > >
> > > ps i'm on fedora 7 with
> > > Java 1.6.0_03 with Sun Microsystems Inc. Java HotSpot(TM)
> > > Client VM mixed mode, sharing
> >
>

Re: Java Error

Yair Altman — Fri, 02 Nov 2007 09:18:20 -0400

> Hmm it seems to be a problem when I move a window to my
> second monitor. Is this not a known issue or something?
>
> > Still getting this:
> >
> > java.lang.NullPointerException
> > at
com.mathworks.jmi.bean.MatlabBeanInterface.addCallback(MatlabBeanInterface.java:680)
> > at
com.mathworks.jmi.bean.MatlabCallbackInterface.addCallback(MatlabCallbackInterface.java:128)
> > java.lang.NullPointerException

Maybe related to this known bug:
http://www.mathworks.com/support/bugreports/details.html?rp=383414

Yair Altman

Re: Java Error

Darren — Fri, 02 Nov 2007 14:54:07 -0400

I'm getting the exact same error on Kubuntu 7.04. It seems
to be causing trouble with any callback functions my figure
might have. I have a ButtonDownFcn in the figure that works
fine until the error gets thrown, then the callback is
totally ignored.

Any ideas?

Darren

Re: Java Error

Batuhan Osmanoglu — Fri, 18 Jul 2008 21:02:03 -0400

I get the same error when I use an external JRE (specified
using "setenv MATLAB_JAVA /usr/java/jdk1.6.0_05/jre" in
c-shell.) Also it happens when I try to use uigetdir
function. If I unset the MATLAB_JAVA I don't get error
messages...

Too bad, because I need MATLAB_JAVA to be able to call my
java codes from matlab.

Cheers,
Batu.

Matlab: R2007a (I haven't tested anything I wrote above with
R2007b or 2008...)

"Darren " <darrenb@NOSPAM.udel.edu> wrote in message
<fgfdmf$kv8$1@fred.mathworks.com>...
> I'm getting the exact same error on Kubuntu 7.04. It seems
> to be causing trouble with any callback functions my figure
> might have. I have a ButtonDownFcn in the figure that works
> fine until the error gets thrown, then the callback is
> totally ignored.
>
> Any ideas?
>
> Darren