Invalid MEX-File name.mexw32 : The specified module could not be found.
Recently we have been recompiling some critical mex files using Microsoft Visual Studio 2010. This has led to a significant speed up on some occasions and enables us to suppport 64 bit versions.
Mex files compiled this way require a number of Microsoft run-time libraries that may or may not be present on your system
You can obtain them from Microsoft directly by visiting this page and following instructions.
Alternatively, do a search on "Microsoft Visual Studio 2010 run-time libraries"
For general information on this type of error see: Mathworks Information on this error