Error while using enum in 2013b

I am getting error while using enum via .m file

In BsClrs_pspdefineIntEnumTypes.m file below enum is defined

Simulink.defineIntEnumType('BasicColors', ... 
  {'Red', 'Yellow', 'Blue'}, ...
  [0;1;2], ... 
  'Description', 'Basic colors', ...
  'DefaultValue', 'Blue', ...
  'HeaderFile', 'mybasiccolors.h', ...
  'DataScope', 'Imported', ...
  'AddClassNameToEnumNames', true);

Error:

Error using Simulink.defineIntEnumType Attempt to execute SCRIPT defineIntEnumType as a function: C:\Program Files\MATLAB\R2013b\toolbox\simulink\simulink\+Simulink\defineIntEnumType.m