Dupli Frames_Orientation in a straight arch curve

Hello !

I am in trouble with a dupli Frames issue.

I have modeled a piece of a frame, then I want to duplicate it on various curve in order to manage my modeling.

I’ve done these steps :

  • Model a curve (handletype : free) with four verteces
  • Model the frame
  • Parent the frame to the curve
  • Set up the number of frame, the follow option and some curve option as on the image below


It’s quite good but you see that the two pieces on the corner are not well-placed. I understand it’s kind of the half of the angle of the curve. Can I set up something which solve my problem ?

Have a nice day,

Eridan