CYPE 3D may display the following error:
A tie cannot have intermediate nodes.
The problem can be found in the "Analysis" menu, selecting "Show/Hide incidents":
The intermediate node may have been generated when entering the tie by keeping the "Generate nodes at intersection points" option in the "Bar" menu activated. This option should remain deactivated when inserting ties:
To solve the problem, the generated node can be deleted from "Node", "Delete".