[galaxy-dev] Error executing tool: 'hg19'

Hi, After a quick try with visualising track in Trackster (importing one chromosome of hg19 - which did not succeed BTW), none of the tools in my local galaxy appear to work. They all send this error message: Error executing tool: 'hg19' This bug has been reported before, but I was wondering if somebody suggest a fix for this? Thanks! Joachim.