Import OmniOutliner columns as User Data in Omnigraffle
 

I'd like to import a .oo3 file containing rows with columns in Omnigraffle as shapes with User Data (mapping each column to a User Data).

Here my best attempt : If I drag the oo3.file in OG and I choose an automatic layout template with User Data (I added them previously to the template), they aren't displayed in the mapping form of the "import outline" dialog. So I failed.

Any idea ? Many thanks in advance