Confusion about what type of error is used in Hessian Operator Test Case
In the File
TestHessian.cpp one computes the absolute error for each entry of the Hessian matrices of a specific Field (Gaussian or linear, depeneding on cmdline arg).
After the loop it computes the relative error but then overrides its value again with the absolute error (see line 192 ).
This has caused the error convergence to be of order less than one for a stencil that should be of order 2.