User`s manual

Advanced Topics
3-37
Memory Management
As of Version 5.2, MATLAB now implicitly destroys (by calling
mxDestroyArray) any arrays created by a MEX-file that are not returned in the
left-hand side list (
plhs()). Consequently, any misconstructed arrays left over
at the end of a MEX-file’s execution have the potential to cause memory errors.
In general, we recommend that MEX-files destroy their own temporary arrays
and clean up their own temporary memory. For additional information on
memory management techniques, see the sections “Memory Management” on
page 2-38 and “Memory Management Compatibility Issues” on page 1-37.