Hi I am trying to use R for Arabidopsis data , but I can't get the genes annotation correctly, I am using : mget(AffyID[1:10], env = ath1121501GENENAME) Error in mget(AffyID[1:10], env = ath1121501GENENAME) : object "ath1121501GENENAME" not found problem is env parameter. Thanks Afsaneh