[BioC] GOtools: argument is of length zero

[Dr_Gyorffy_Balazs]

Hi all,

I have tried to use the GOtools package, but I have
encountered following problem after running the ontoCompare
command: 

[1] "Starting ontoCompare..."
Error in if (ncol(results) == 0) results <- NA : 
        argument is of length zero


What is the reason for this? My original script is pasted
below.
THank you:
Balazs

---------------------------------------
mdr.table.5fu=read.table(?5FU.txt?, header=FALSE,
as.is=TRUE)
mdr.table.cisplatin=read.table(?cisplatin.txt?,
header=FALSE, as.is=TRUE)
mdr.table.cyclo=read.table(?cyclophosmphamid.txt?,
header=FALSE, as.is=TRUE)
mdr.list <- list(fu=mdr.table.5fu,
cisplatin=mdr.table.cisplatin,
cyclophosphamid=mdr.table.cyclo)
mdr.compared<-ontoCompare(mdr.list, probeType ="hgu133a",
method = "TIDS", plot = TRUE)