GSL simplex error when using high pixel size in EM2D

[ichem001]

There is an unexpected behavior in EM2D right now when fitting a model to an image. The error shows up when the pixel size is fairly high (~2Å/pix).

The error message from GSL library is: gsl: simplex.c:430: ERROR: nmsimplex_contract_by_best failed Default GSL error handler invoked.

So far, I have tracked the error up to the function in the source code - ProjectionFinder::get_complete_registration() but not sure why it happens - might be from how python handles warning from gsl c++ code but that's just conjecture - will update if I get further in the next few days.