Hi, I'm trying to set up an asynchronous data source in galaxy. I follow the examples that Helena provide here : https://github.com/erasche/galaxy-data_source-examples/tree/master/flask It's a success for synchronous modE. But when I test the asynchronous mode, it fails. from what I understand, the file in history (that would contains the data) is not well created. The example creates a link like this one : https://galaxydev.biogemma.fr:4430/export/?gx_url=https%3A%2F%2Fgalaxydev.bi... When I click on the link, no file is created in my history. The error in the log is : File "lib/galaxy/webapps/galaxy/controllers/async.py", line 150, in index open(data.file_name, 'wb').close() # create the file IOError: [Errno 2] No such file or directory: '' The filename is missing, so I have no new file in my history waiting for the asynchronous process to fill it. I've described the error here (with complete log messages) : https://github.com/erasche/galaxy-data_source-examples/issues/6 Can anybody reproduce this? Is this an issue? or a misconfiguration from my side? thank you. Fred