While testing an upgrade from latest_2014.10.06 to GitHub release_15.03 branch (cloned today) I ran into an issue trying to use the "Run this job again" functionality on a dataset. I was playing with creating dataset lists using "Operations on multiple datasets" and noticed that after adding a dataset to a dataset list, trying to run the job again fails. This is the tool form that gets displayed: [image: Inline image 1] Additionally an error is logged: galaxy.tools ERROR 2015-04-15 21:58:53,258 'HistoryDatasetAssociation' object has no attribute 'collection' Deleting the dataset list makes no difference. However, if I copy this dataset to a new history and click "Run this job again", no error occurs and the proper tool form appears. If I then add the dataset in the new history to a dataset list, the error reappears. Cheers, Brian -- Brian Claywell | programmer/analyst Matsen Group | http://matsen.fredhutch.org <http://matsen.fhcrc.org/> Fred Hutchinson Cancer Research Center