[BioC] problems using simpleaffy

[Georg Otto]

Hi bioconductors,

I have a problem trying to reproduce the user´s guide of simpleaffy 
with my own data. I do it like this:

 > x<-read.affy("covdesc")
 > x.mas5<-call.exprs(x,"mas5")
Background correcting
Retrieving data from AffyBatch...done.
Computing expression calls...
..........done.
scaling to a TGT of 100 ...Scale factor for: 1.CEL 1.27818905696529e-247
Scale factor for: 2.CEL 8.30729457715284e-252
Scale factor for: 3.CEL 1.27818905696529e-247
Scale factor for: 4.CEL 1.27818905696529e-247
Scale factor for: 5.CEL 2.37641150479280e-156
Scale factor for: 6.CEL 2.37641150479280e-156
Scale factor for: 7.CEL 1.27818905696529e-247
Scale factor for: 8.CEL 1.27818905696529e-247
Scale factor for: 9.CEL 2.37641150479280e-156
Scale factor for: 10.CEL 2.37641150479280e-156
 > qc.data<-qc(x, x.mas5)
Getting probe level data...
Computing p-values
Doing PMA Calls
Error in FUN(X[[4]], ...) : subscript out of bounds


First of all , the Scale factors look pretty odd. Secondly, I have no 
clue, what the error message means. I would appreciate any hint.

I am running simpleaffy 2.10 with R 2.0.1 on  powerpc-apple-darwin6.8


Best,

Georg