title: How to solve Invalid MEX file error In Matlab?
body: <p>Every time I try to define a symbolic variable I get this error message </p>
  
  <blockquote>
    <p>Invalid MEX-file 'C:\Program Files\MATLAB\R2013a\toolbox\symbolic\symbolic\mupadmex.mexw64':
    C:\Program Files\MATLAB\R2013a\toolbox\symbolic\symbolic\mupadmex.mexw64 is not a valid Win32 application.</p>
  </blockquote>
  
  <p>please help :)</p>