Error using fminsearch: No class * can be located on Java class path

Hello,

I'm experiencing some problems when executing fminserach with R2012a 32 bits. Always when I use the plotting option @optimplotfval the function crashes with the following error:

• Error using javaMethodEDT
• No class com.mathworks.toolbox.optim.OptimGUI can be located on Java class path
• Error in callAllOptimPlotFcns (line 78)
• optimtoolGui =
• javaMethodEDT('getOptimGUI','com.mathworks.toolbox.optim.OptimGUI');

The problem appears also when trying to do the example in the documentation with the function onehump (you can search for this in the help). The error is new to me (it worked before) and one colleague with a different computers gets it too.

I hope you can help me on solving this problem.

Bye Dr. Martin Chavez

Answer 1

[Alan Weiss]

This code works for me:

 x = fminsearch(@(x)sin(x(1))*cos(x(2)),[-2,1],optimset('PlotFcns',@optimplotfval))

 x =

   -1.5708    0.0000

Perhaps you should call

 rehash toolboxcache

If the problem persists, I suggest that you contact technical support.

Alan Weiss

MATLAB mathematical toolbox documentation

Answer 2

[Martin Chavez]

Hi Alan,

Thanks four your help but this did not wor for me. I get exactly the same error.

Bye, Martin Chavez