Hi, 
The following error occur when trying to download hg19 known gene. I am using rtracklayer 1.38.3

>hg19db <- makeTxDbFromUCSC(genome = "hg19",tablename ="knownGene")
Error in names(trackIds) <- sub("^ ", "", nms[nms != "new"]) : 
  'names' attribute [212] must be the same length as the vector [211]

Does anybody have the same problems or knows how to solve this?

Thanks in advance!

That's an old bug that has been fixed. You seem to be using an old version of R/Bioconductor, and should update.

That said, you don't need to build that TxDb package, as one already exists:

library(BiocInstaller)

biocLite("TxDb.Hsapiens.UCSC.hg19.knownGene")

To get the already-built version of the TxDb that you are trying to build.