The error which you are receiving could be due an incorrect MATLABPATH setting, which is likely the result of working with a pathdef.m which was created in an older MATLAB release.The default paths of MATLAB may not be configured properly on your workstation.
To resolve this issue use "restoredefaultpath" to make sure all directories which MATLAB R2017b requires are on the path and then save this new path as the default using "savepath".
In order to reset MATLAB path, please execute the following commands in your MATLAB command window:
>> restoredefaultpath
>> savepath
Please note that executing the above commands would delete all the previous path information and replace it with the factory settings. Hence, you might want to back up the old 'pathdef.m' file so that you can use other path information from it at a later period.
Please refer the following link for details about this:
