Space key stops working

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Clemens
Clemens 2011-6-15
Hi,
This happens to me about once every two weeks and so far I do not know how to reproduce the error. So maybe you have suggestions what to try next time.
The symptoms are I can normally enter text - but no space. When I hit space it beeps - and that's it. This is in the command window as well as in the editor. Making Matlab pretty unusable. The weird thing is - in another Matlab window space is working fine - also in other programs.
My solution so far is restarting Matlab - which is annoying. I tried lots of key combinations in case this was like the one annoyance with the insert key - but so far found none that would solve it.
Today it happened to me in a freshly started Matlab process. It was running a few minutes - but I didn't perform any calculations. Noted it when I tried to cd to a directory with spaces in the name.
If it matters I'm still on 2009a.
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Clemens
Clemens 2011-6-20
Sorry for the delay.
I am on windows XP. And yes I did update JRE. But I'm working on the machine that got matlab installed.
I'm not sure if I did try to copy and paste a space. Should try it next time explicitly.
Clemens
Clemens 2011-6-20
By the way - about Java I got "Java(TM) 6 Update 24", "Java(TM) SE Development Kit 6 Update 20", "Java(TM) SE Runtime Environment 6 Update 1" installed.

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回答（2 个）

Jan
Jan 2011-6-20
Try to start Matlb without java:
matlab -nojvm
Or run Matlab with the Java version included in the installer by deleting the environment variable MATLAB_JAVA.
If the problem vanishes, the updated Java is likely the cause. With Java 6.24 under Matlab 2009a/WinXP I got several other problems, e.g. I could not update the position of UITREE objects reliably, if the figure is resized. But the keyboard worked fine.
I had similar problems with non-functional curly braces after using an updated JRE under Matlab 6.5.
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Clemens
Clemens 2011-6-21
Well since I can't reproduce it - no idea if it helps.
But I just updated to Java 6.26. Maybe my troubles are gone (cross fingers).

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Clemens
Clemens 2011-8-23
Update It just happened again. Came back from coffee break - and just blinking.
Directly before I was changing the windows design. I was looking through logs and if the Java console could give me info.
As last resort I tried minimizing and maximizing the window - and it seems to be restored.
so my current theory is that matlab doesn't survive layout changes.

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