I am undertaking a Roundabout Design using the associate alignment method (associating Construction Lines of the legs to the crown line on the circulatory carriageway).
After associating the two strings, I go to the vertical design panel to carry out the vertical alignment on the construction line. I go through the process of picking the ground model, scales etc, however, after that i am faced with the 'Continue alignments' prompt (screenshot attached) and it would not let me progress any further to actually undertake the vertical design.
I have tried manually entering the vertical alignment string name but with no luck to progress any further. The alignment design shwon is that of the circulatory carriageway crown line.
Any thoughts on why this is happening and what I may be doing wrong prior to getting to this point or how i can progress beyond this point to do the vertical design for the construction line.