Tutorial Example Failure: NB6.Cases.Studies.Nanocomposite

[martintb]

The first example in the tutorial/NB6.Cases.Studies.Nanocomposite notebook fails on some users machines with the following error:

ValueError: Jacobian inversion yielded zero vector. This indicates a bug in the Jacobian approximation.

This error has been reported by several users but does not seem to occur for everyone. Whether or not the error occurs does not seem to be correlated with OS or pyPRISM install method. Unfortunately, because I don't currently have access to a machine where this error occurs, it's impossible to debug.

While it would be feasible to replace this example, I think it's more important to discover why this occurs. I suspect the error may be related to BLAS/LAPACK libraries, but I don't have any way to test this suspicion.