Dear list,

When running glmer I got a warning message:

Warning in rankMatrix(X) :
   rankMatrix(<large sparse Matrix>, method = 'tolNorm2') coerces to 
dense matrix.
   Probably should rather use  method = 'qrLINPACK' !?

With verbose=TRUE, the following output is produced:

(NM) 20: f = 1.42942e+006 at    0.119639     0.45168 -0.0183788 
-0.00152183   0.0246831  -0.0123731   0.0524116 -2.7772 -0.00823687   
0.0111525 0.000371882 0.000425201 2.08593   -0.804334   -0.597046    
-1.23742   0.0721005 -0.00524431  -0.0777254  -0.0455618   0.0182222  
0.00949421 0.0178676  -0.0760966  -0.0310283  -0.0179217
(NM) 40: f = 1.42942e+006 at    0.119639     0.45168  -0.0183788 
-0.00152183   0.0246831  -0.0123731   0.0524116     -2.7772 
-0.00823687   0.0111525 0.000371882 0.000425201     2.08593 -0.804334   
-0.597046    -1.23742   0.0721005 -0.00524431 -0.0777254  -0.0455618   
0.0182222  0.00949421   0.0178676 -0.0760966  -0.0310283  -0.0179217
(NM) 60: f = 1.42942e+006 at    0.119639     0.45168  -0.0183788 
-0.00152183   0.0246831  -0.0123731   0.0524116     -2.7772 
-0.00823687   0.0111525 0.000371882 0.000425201     2.08593 -0.804334   
-0.597046    -1.23742   0.0721005 -0.00524431 -0.0777254  -0.0455618   
0.0182222  0.00949421   0.0178676 -0.0760966  -0.0310283  -0.0179217
(NM) 80: f = 1.42942e+006 at    0.119639     0.45168  -0.0183788 
-0.00152183   0.0246831  -0.0123731   0.0524116     -2.7772 
-0.00823687   0.0111525 0.000371882 0.000425201     2.08593 -0.804334   
-0.597046    -1.23742   0.0721005 -0.00524431 -0.0777254  -0.0455618   
0.0182222  0.00949421   0.0178676 -0.0760966  -0.0310283  -0.0179217
(NM) 100: f = 1.42942e+006 at    0.119639     0.45168  -0.0183788 
-0.00152183   0.0246831  -0.0123731   0.0524116     -2.7772 
-0.00823687   0.0111525 0.000371882 0.000425201     2.08593 -0.804334   
-0.597046    -1.23742   0.0721005 -0.00524431 -0.0777254  -0.0455618   
0.0182222  0.00949421   0.0178676 -0.0760966  -0.0310283  -0.0179217
(NM) 120: f = 1.42942e+006 at    0.119639     0.45168  -0.0183788 
-0.00152183   0.0246831  -0.0123731   0.0524116     -2.7772 
-0.00823687   0.0111525 0.000371882 0.000425201

The estimates of fixed and random effects look "normal", no unreasonable 
results. However, should I still be worried about the estimates found, 
given this warning message and verbose results?

I updated package lme4 recently, using "Update packages" in the main 
menu. My R version is 3.0.2. Thanks for any help! Regards,

Ben.

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