griddata runtime error — Python / SciPy (Interpolation)

Question

I use scipy\'s griddate-function for interpolation.

What does the following error message means which appears when python is executing the griddata-function?

Answer 1

This indicates that the qhull (http://www.qhull.org) code which is used by the function is not returning a result because of an error.

Does this always happen, or only for certain inputs?

Can you post an example input which causes the error?