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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