error in MATLAB while shutting down

I am trying to close my MATLAB but getting the following error

Attempt to execute SCRIPT builtin as a function: C:\ProgramFiles\MATLAB\R2010b\toolbox\compiler\mcr\matlab\lang\builtin.m

I just clicked on the windows close icon. Even when I type close all

Error: File: close.m Line: 1 Column: 25 The input character is not valid in MATLAB statements or expressions.

What can be the problem.

Answer 1

[per isakson]

Try

    which  builtin -all

it should return one line similar to

    built-in (C:\Program Files\MATLAB\R2012a\toolbox\matlab\lang\builtin)

The error message indicates that you have a script named builtin, which is called instead of the Matlab function. If so, rename that script.