Question

Hello Fellow Matlab Users,

I was wondering if anyone could provide me with some insight on how to change the bash path environment in Matlab.

Basically, if I start a given application in the terminal outside of Matlab everything works fine. (e.g.: 3dMean)
However, if I try it in Matlab with the system command (system('~/abin/3dMean') (as you can see I have to tell Matlab where it is located) I get the following error:

dyld: Library not loaded: /usr/X11/lib/libpng12.0.dylib
  Referenced from: /Users/kjio/abin/3dMean
  Reason: Incompatible library version: 3dMean requires version 42.0.0 or later, but libpng12.0.dylib provides version 40.0.0
~/abin/3dMean: Trace/breakpoint trap

So I checked the bash PATH in Matlab, this is the output:

system('echo $PATH')

/usr/bin:/bin:/usr/sbin:/sbin

I tried to call the application with the following command:

system('env PATH=~/abin LD_LIBRARY_PATH=/usr/X11/lib 3dMean')

but that also doesn’t work. I get the same error message.

Next what I tried was to change the PATH:

setenv('PATH', [TEMP; getenv('PATH') ]);

In the variable TEMP were all the paths of interest out of the Terminal $PATH.
Now I could do that

system('3dMean')

But I get still the same error message.

Is there any way to update the maci64 env or how can I change the bash PATH in Matlab to overcome this problem ??

Thanks

Answer 1

It looks like Matlab is linking against a different PNG library than when you run 3dMean from the command line. You probably want to change the DYLD_LIBRARY_PATH within matlab (not LD_LIBRARY_PATH) to point to a newer version of libpng