Hi,

I'm fitting a model for two-nested binay data in glmmPQL function but I have 
this error message: "Error in solve.default(estimates[dimE[1] - (p:1), dimE
[2] - (p:1), drop = FALSE]) : system is computationally singular: reciprocal 
condition number = 1.14416e-018".

How do I can solve this problem? Or the problem are the data?

Thanks,


Pedro A. Torres S.
Graduate Student - Statistics
Department of Mathematics
University of Puerto Rico at Mayaguez
(1 787) 832-4040 X 2537

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