[BioC] a problem with package limma (read.maimages)

[Svetlana Bulashevska]

Dear Sirs,
I would greatly appreciate if you could help me with my problem.
I try to read in Genepix data and have a problem with the function 
read.maimages,
even if I list the columns explicitely like this:
RG <-read.maimages(files,source="genepix",columns=list(Gf="F532 
Mean",Gb="B532 Median"),annotation=c("Block","Column","Row","Name","ID"))
I guess I have different column heading in my image output file as is 
required in the
function and some columns are absent. Could you please tell me how I can 
avoid this problem.
Thank you,
Svetlana Bulashevska.