Why am I getting a Duplicate directory name from the Applications folder in my MATLAB and MAC os X?

I am getting:

Warning: Duplicate directory name:
/Applications/MATLAB_R2015b.app/toolbox/stateflow/stateflow 
> In restoredefaultpath (line 52)
  In MNIST_for_CV (line 2)

why is that happening? How do I fix it?

Answer 1

[Walter Roberson]

Use pathtool from the MATLAB command line, find the second place that directory is listed, remove the entry, Save the path.

[xu zhang]

I have the same problem. I typed 'pathtool' in the command window, and 'matlabpath' also works to show the paths. But only one directory "/Applications/MATLAB_R2015b.app/toolbox/stateflow/stateflow " shows up. What do you mean by "the second place that directory is listed"? Thanks!