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Re: nasty warning

From: Sebastian Schöps
Subject: Re: nasty warning
Date: Sun, 11 Oct 2015 00:46:50 -0700 (PDT)

Victor Hanby-2 wrote
> I’ve just updated Octave (to 3.8.2) and fltk using MacPorts, I’m running
> OS X Yosemite 10.10.5. I now get multiple copies of this dire-sounding
> message each time I draw a plot:
> Oct  9 17:43:45 Victor-Hanbys-iMac.local octave-cli-3.8.2[13313] 
> <Error>
> : CGContextAddLineToPoint: invalid context 0x0. This is a serious error.
> This application, or a library it uses, is using an invalid context  and
> is thereby contributing to an overall degradation of system stability and
> reliability. This notice is a courtesy: please fix this problem. It will
> become a fatal error in an upcoming update.
> Any suggestions would be most welcome.

Dear Vic, 

if you post bugs please make sure that you use the latest version and
preferably check the bug tracker first  since the problem might be fixed
already (Octave is currently at version 4 while you are using 3.8). It's not
trivial to install version 4 on the mac but many people are currently
working on it. I think the only blackbox solution available today is to use

I do not believe that Octave endangers your system's stability. Operating
system are nowadays reliably taking care of those things. I have seen
occasional crashes of Octave but that's it.


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