Download MATLAB PARALLEL COMPUTING TOOLBOX 4 User`s guide

Compatibility Considerations
Calling matlabpool continues to work in this release, but now generates a warning. You
should instead use parpool to create a parallel pool.
Removed Support for parallel.cluster.Mpiexec
Support for clusters of type parallel.cluster.Mpiexec has been removed.
Compatibility Considerations
Any attempt to use parallel.cluster.Mpiexec clusters now generates an error. As an
alternative, consider using the generic scheduler interface, parallel.cluster.Generic.
3-5