[GSAS-II] Flaky experience with the later iterations of GSAS-II

[Martin Dove]

Dear GSAS folk

When I switched to GSAS II from its predecessor, I immediately liked what I found and had a very good experience. I successfully tackled some new data and got my team running it.

But more recently, whether it is connected with an upgrade or not (I now have version 4187), I am finding GSAS to be  very flaky, and when I ask my team if they have the same experience they say they do.

For example, sometimes refinements after pressing the Refine command just don’t happen. Nothing happens, or if it does. sometimes nothing changes. There seems no information. The data plots seem to behave chaotically needing a press of the home button to restore order. Sometimes values get reset on reloading. Sometimes I have to switch from analytic to numeric to move forward. Or quit and restart.

I may be doing something wrong of course, but since I have been doing Rietveld refinement for a long time I think I know what I am doing. I was ok with GSAS I, never finding flaky behaviour (but I can’t go back, even I wanted to, since it is no longer working on the latest MacOS). Perhaps it is a Mac-specific problem (I am on the latest MacOS, but my colleague is having similar problems using a Windows tablet computer).

For what it is worth, right now we are refining data from the new Chinese Spallation facility.

I don’t quite know what to ask more specifically but for the moment this is to initiate a discussion perhaps.

Best wishes

Martin Dove


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Martin Dove
School of Physics and Astronomy, and Materials Research Institute
Queen Mary University of London
Mile End Road, London E1 4NS
Tel. 020 7882 3426

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