curved beam compas mark

[sapch]

Why can't  curved beam's  compass mark show?

But the same set of straight beams will display correctly.

[ArjunGaba]

@sapch  Normal vector is always changing in curved beam but at straight beam it remains same..As  compass direction changes at when you move on curved beam but in case of Straight line it remain same....

[sapch]

Thank you very much for your reply. In 3D View, the curved beam cannot display the compass mark?

[ArjunGaba]

@sapch  Same issue it will not show. as i stated above..

[sapch]

Thank you for your answer！"Tekla" can be used to indicate the curvature of the beam. Did I use it incorrectly?See the results of Tekla:

[ArjunGaba]

@sapch  the symbol you are showing is the starting point of member when you modeled it... It is not the  compass mark...

[sapch]

So how do you get this sign of the arc beam to show up on the 3D view?