Undefined variable "matlab" or function "matlab.apputil.create" Error with Package App

When I click on the Package App icon in R2012b I get the following error:

Undefined variable "matlab" or function "matlab.apputil.create".

and nothing opens.

Am I missing something from my path?

Answer 1

[Sean de Wolski]

Seems like a path issue.

First try:

rehash toolboxcache

If that doesn't work,

restoredefaultpath;rehash toolboxcache