Modelling of Long Bend Radius_Error in Modelling

Dear all,
I am trying to model the following configuration, but an error is given.
The radius is 1525 mm for each bend.
I am respecting the exact distances upstream and downstream the elbow, but the error remains.
Is anybody can explain why and how this bend should be modeled, to avoid such errors?

Thank you.

You need to delete the zero degrees node on your second elbow. It is the same point in space as the end point of the first elbow.

thank you for the reply.