Hi all,


 When trying to identify different probes that interrogate the same gene for hgug4845a.db instead of hgug4112a.db, as it follows: 


library(hgug4845a.db) #<== This package contains the annotation information for the used rat arrays http://www.bioconductor.org/packages/release/data/annotation/
CV.rep.probes(dd,"hgug4845a.db",foreground="MeanSignal", raw.data=TRUE, writeR=T, targets)

genes.rpt.agi(dd,"hgug4845a.db",raw.data=TRUE, WRITE.html=TRUE,REPORT=TRUE)

I get the following error:

Error in lookUp(PROBE_ID, annotation.package, "SYMBOL") : 
  No keys provided


I say that genes.rpt.ago uses this lookUp function, but what should I give as keys for the SYMOBOL parameter?


Thank you.

Best wishes,
Adriana
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