[sumo-user] Problem with mpl_dump_onNet.py

[<mic...@fr...>]

Hello users,
I wish to run mpl_dump_onNet.py, using both a network and its "hbefa" output file, defined in an additional file, as clearly explained in the tutorial. My "Hbefa file", resulting from a cfg run looks as described in the tutorial, but, although I used an edgeData definition (not an laneData), mpl_dump_onNet.py aborts asking for a speed value (line 94), resulting in an "Keyerror : maxdata".   
Is there a parameter to add to the additionnal file or any error in my input files to check ?
Thank you so much for any help
Michel Souweine