I can't assign properties to a Tiebar. The tiebar T1 is in the drawing but I get n error, no tiebar element installed.
Beams and cables are no problem. After i create a strip the properties op de T1 will popup in the strip property box. See attachment. What is going wrong here.

I'm on vacation right now but sometimes next week I'll take a look at this issue. Until then, would you please attach the script file of this problem?

couple of comments on your screenshot before getting to detail:

1- please generate FE mesh before creating structural element. ADONIS should report warning since order matters in it if not it's a bug that need to be fixed later on.

2- structural element with label "S" is strip element and should be used for geogrid simulation. position of strip element in the plot seems to be unreasonable.

tieback material assignment should be fixed now (in new version 2.0.1). please give it a try and let me know if you still have issue with it.