Dear doctor:

I try to use the rtracklayer package to interact with UCSC to show the CNV track, but when I follow the guide from web and tutorial , I really get the UCSC show webpage, but in the webpage, the track cannot show.

the code I use like this:

library(rtracklayer)

session = browserSession()
export(cpneTrack, "cpneTrack.bed")
restoredTrack2 <- import("cpneTrack.bed")
track(session, "cpneRestored") =  restoredTrack2
view <- browserView(session,restoredTrack2[2],pack="cpneRestored")

but in the webpage, the track cpneRestored cannot show.

So I want to some suggest about the reason? 

At some point UCSC changed, so now we have to update rtracklayer. Please wait for the new version in a couple days.

Oh oh oh, that's the reason,  It's no wonder that cannot be achieved.  Yes, thank you very much, I will wait it, very thanks ^_^!!