Also this is already backported and fixed in 16.01
        
        
        Sorry for causing this bug in the first place. 
        M. 
          
          
            
            Well
              done for solving this Fabien, with only a small hint from
              me.
              I'm glad to see your suggested fix has already been
              applied to
              the Galaxy repository so should be in the next stable
              release.
              
              Thank you!
              
              Peter
              
              (Also thank you Martin, Nicola, Dan, etc)
              
              
              On Tue, Mar 22, 2016 at 8:43 PM, Martin Čech <marten@bx.psu.edu> wrote:
              > Thank you very much for solving this Fabien, The PR
              with your fix has been
              > created here: https://github.com/galaxyproject/galaxy/pull/1985
              >
              > Martin
              >
              >
              > On Mon, Mar 21, 2016 at 5:43 PM fmareuil <fmareuil@pasteur.fr> wrote:
              >>
              >> Hi Peter,
              >>
              >> I worked on it today and I found  the reason of
              this bug. In the upload.py
              >> tool, the existence of dataset.space_to_tab is
              tested. In the old version of
              >> the data library, when the option was unchecked,
              the value space_to_tab was
              >> None and the test worked. But in the new version
              the value of space_to_tab
              >> is "False", it's a string and the test "if
              dataset.space_to_tab" returns
              >> True.
              >> It is possible to fix it with a little correction
              of the
              >> "/lib/galaxy/webapps/galaxy/api/lda_datasets.py".
              >> I join a patch with this email.
              >> I can propose a pull request if you want.
              >>
              >> Best,
              >>
              >> Fabien
              >>