Occasionally errors may occur during the iTwin operations. Review the messages carefully, and make revisions as necessary.

Some iTwin models may not be compatible with the RAM Structural System, which has certain expectations of well-defined floors and roofs. Some BIM models may not be suitable for transferring data from the BIM model, through the iTwin, and into analysis programs such as RAM Structural System. BIM programs don’t generally enforce that member end locations coincide with the support location; if it looks correct graphically it is close enough. Analysis programs, on the other hand, require precise and correct coordinates.

If a RAM Structural System model is created from an iTwin that originated with a BIM model, and the RAM Structural System indicates that members are unsupported or members are missing, the problem is almost always the fault of the original BIM model, not the iTwin Analytical Synchronizer or the RAM Structural System. When that occurs, revise the BIM model to be more precise before attempting to import it into the RAM Structural System.

The RAM Structural System creates a backup file of the model, with an extension of .backup, before iTwin operations begin. This allows you to retrieve that original model in the event that something seriously wrong occurs when updating the model from an iTwin.