If I recall it correctly (haven't had the opportunity to play with Fullprof for a few years) Sycos is an instrument misalignment/sample transparency correction parameter. Perhaps you are using an impossible initial value for it - should be very close to zero. As I share with my students on occasion, RTFM (at least for instances of F = fantastic).
Dr. Y -----Original Message----- From: rietveld_l-requ...@ill.fr [mailto:rietveld_l-requ...@ill.fr] On Behalf Of Lubomir Smrcok Sent: Wednesday, January 14, 2015 2:05 PM To: Josh Kim Cc: rietveld_l@ill.fr Subject: Re: FullProf well, do you know why are you refining just that parameter ? lubo On Wed, 14 Jan 2015, Josh Kim wrote: > Dear Rietvelds, > > I am new to FullProf, and am familiar with the difficulty in preparing a > decent .pcr file, but have run into a problem to which I cannot pinpoint the > error: During the first iteration of refinement I get the following message: > > "Singular Matrix!! Problem with SyCos_pat1 no.: 1? > > Any ideas? I can provide the .dat and .pcr file if anyone is interested > > Thanks > Josh
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