[BioC] rtracklayer/argo error: Error in .jcall("calhoun/gebo/ui/DesktopFrame"

[Paul Shannon]

Making my first attempt to use the argo browser, rather than UCSC, I  
run into the error (with sessionInfo) shown below.

Any suggestions?

Thanks!

  - Paul


session = browserSession ('argo')
Error in .jcall("calhoun/gebo/ui/DesktopFrame", "Lcalhoun/gebo/ui/ 
DesktopFrame;",  :
   RcallMethod: cannot determine object class
 > sessionInfo ()
R version 2.8.1 (2008-12-22)
i386-apple-darwin8.11.1

locale:
en_US/en_US/en_US/C/en_US/en_US

attached base packages:
[1] tools     stats     graphics  grDevices utils     datasets   
methods   base

other attached packages:
[1] rtracklayer_1.2.2 RCurl_0.94-0      Biobase_2.2.1

loaded via a namespace (and not attached):
[1] Biostrings_2.10.15 IRanges_1.0.9      Matrix_0.999375-18  
XML_1.99-0         grid_2.8.1         lattice_0.17-17    rJava_0.6-1
 >