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
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Brian Claywell | programmer/analystFred Hutchinson Cancer Research Center