Hi,

When I tried to get the exons sequence, I got an error..


library("BSgenome.Hsapiens.UCSC.hg19")

txdb<-TxDb.Hsapiens.UCSC.hg19.knownGene


tx_Exons<-exonsBy(txdb)

 tx1<-tx_Exons[1:3]


(seq<-getSeq(Hsapiens,tx1))

Error in .toGRanges(names, strand) : invalid 'names'

Any help is apreciated
Thank you.

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