3D integratin area warning

Hi everybody,

I wanted to integrate a 3d field with integral3 (MATLAB 2012a) and it actually worked although at a few integration points i get the following error warning:

"Warning: reached the maximum number of function evaluations(10000). The result fails the global error test.”

In the surf of my 3d function these points are simply left blank. Does somebody know how to increase the maximum number of function evaluations ? And what actual the problems is ?

Thank you in advance