In 99% of cases, this is an issue with the rtracklayer connection to UCSC. Gviz does not implement any of that functionality. I'd advise to test whether the rtracklayer UCSC functionality works for you, and if not, to reach out to the rtracklayer package maintainers.
I have just try it on both release and developmental version and both works for me. In fact I used "IdeogramTrack" but I assume that was just a typo in your post. Could it be, that you are being firewall or proxy?
Hi Robert, Thanks for the answer.. As far as I know I'm not behind firewall or proxy. In the code below, biomart query works but Ideogram track query does not work.
In 99% of cases, this is an issue with the rtracklayer connection to UCSC. Gviz does not implement any of that functionality. I'd advise to test whether the rtracklayer UCSC functionality works for you, and if not, to reach out to the rtracklayer package maintainers.
Florian
Thanks for the pointer.. I'll check the rtracklayer connection (as much as I can do)..