[BioC] gridsize warnings arrayQualityMatrics

[Amit Kumar]

Dear All,
I am trying to check the quality of a large data set with 388 arrays
in it. I am using bioconductor package "arrayQualityMetrics" for this.
I did following where full58 is expression set:
>qmnorm1 = arrayQualityMetrics(full58, "full58", force=TRUE)

I got no errors except warnings! something like that:
 In KernSmooth::bkde2D(x, gridsize = nbin, bandwidth = bandwidth) :
  Binning grid too coarse for current (small) bandwidth: consider
increasing 'gridsize'

And in the report the boxplot is blank.

Please help!
Amit