Hello!

My name is Seunghee Choi.
I am following Tutorial 6 step by step, but I encountered an issue when executing the "Install Sheet Pile" section. The error message displayed is:
"Disconnected or branching structural elements is not acceptable."
I have carefully followed the provided script, and the error occurs at the following line:

structure("drawliner","beamid",1,"iftype","bothSides","ifid1",1,"ifid2",2,"xlim",9.9,10.1,"ylim",-10.1,0.1)

I have checked for the following possible causes:
Interface elements (ifid1 and ifid2) definition:
Ensured that imaterial("assign",...) is executed before this line.
Excavation sequence:
I tried excavating first before installing the sheet pile, but the issue persists.
Structural connectivity:
Verified that the coordinates do not conflict with existing geometries.
Despite these checks,
I am unable to resolve the issue.
Could someone please advise on what might be causing this error and how to fix it?

Any guidance would be greatly appreciated.
Thank you in advance!

Please attach the script (*.ajs file) you are using, so I can recreate the problem.