[BioC] arabidopsis annotate mget problem

[Siobhan Braybrook]

please excuse me if this is elementary, but I am lost about an error I am
getting.
I want to use a list of probe IDs to get out the genes from ath1121501ACCNUM.

So I did the following:

library(annotate)
library(ath1121501.db)
#next I made a short list of probe IDs to test my mget ability
abaup=c("262128_at","255795_at","266462_at","250648_at","247095_at","258498_at","247723_at","258347_at","245982_at","263497_at")
a1=mget(abaup, ath1121501ACCNUM)
#this worked just fine
#so I made a txt file of all the probe IDs I wanted to look up, and read in
abaupr= read.delim("upgenes.txt", header = FALSE, quote="",sep = "\t")
#then I made it a list
abaupr=as.list(abaupr)  
#then I did just like I did on my test case above but got an error about
#ifnotfound.  
a1=mget(abaupr, ath1121501ACCNUM)
#Error in .checkKeys(value, Lkeys(x), x at ifnotfound) : 
#  the keys must be character strings

#I looked up ifnotfound in mget.....and still dont understand #the error.  
#the only option is NA, but.........
a1=mget(abaupr, ath1121501ACCNUM,ifnotfound=NA)
#Error in .checkKeys(value, Lkeys(x), x at ifnotfound) : 
#  the keys must be character strings

My lack of understanding could be due to my lack of getting mget.....any help?

Thanks!
Siobhan

S.A. Braybrook
Section of Plant Biology
University of California, Davis
Davis, CA
530-752-6980

"The time is always right to do what is right."
-Dr. Martin Luther King Jr.