Abiodun18 Hi all, How do I fix the recurring error message "Invalid d spacing encountered" each time I try to refine using industrial TOPAS-64 V6? Thank you.
johnsoevans It's hard to know without more information. The error probably means there's something fundamentally wrong with your INP file or gui set up. I'd start by looking whether your cell parameters/wavelength/etc are sensible.
rowlesmr Are you refining any cell parameters? If so, turn them off. If not, it could be that there are no peaks calculated for a phase in the range you're modelling.