error with depfun

Hi I'm trying to find dependencies of a function using depfun and I get the following error

MATLAB:dispatcher:loadLibrary Can't reload 'C:\Program Files\MATLAB\R2011a\bin\win64\libmwsimulink.dll'.
Caught MathWorks::System::FatalException

I do not have simulink but i see the dll in my win64 directory

Any Idea?

[Kaustubha Govind]

What function are you analyzing using depfun?