unable to join 2 simple curves

 From:  wimverbe 19 Jan 2015  (1 of 3) 
7190.1 
Hi,

I have drawn 2 simple open curves which I want to join, but it seems impossible. I recreated them, but with same result.
am I overlooking something?
Attachments:
Attachmentcurves wont join.3dm

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