Hi Steve, This means that the Visualization tool is calculating an index. It should eventually finish or you can choose another view (dense or histogram). That said, this tool is under active development, and if you would like to share a link to the visualization, we can take a look to see if this is a known or not. Best, Jen Galaxy team On 11/2/11 9:07 AM, Steve wrote:

Hi,

I'm going through the RNA-seq exercise at http://main.g2.bx.psu.edu/u/jeremy/p/galaxy-rna-seq-analysis-exercise. I'm at step 2 of mapping the reads where I've run tophat and have loaded the output files and the regGene tracks onto a new track browser. When I zoom in (to ~45kbp window), the accepted hits and one of the splice junction tracks from tophat do not show data and instead show a crossed pattern and the browser no longer allows clicking and dragging to move the window. Please advise.

Cheers, Steve

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