The following error “The braced frame has not been completely introduced” may appear over elements defined as “Tie” in CYPE 3D placed on an incomplete bar structure that the program cannot recognise as a braced frame:
To avoid this error, the geometry of the bars to which the tie is linked must be checked in order to be interpreted as a braced frame, in which case the missing bars must be inserted.
For more information, please check the following link to see the program's conditions for identifying a braced frame.