How can I resolve the error message which reads: No node or frame was present in CIS/2 file?

Answer: When importing from CIS/2 to SAP2000, this error message indicates that only non-analytical entities are present, and that these entities cannot be imported for structural analysis. These non-analytical entities may have geometry within the VRML viewer, but they are not suitable for structural analysis, and cannot be mapped with SAP2000 objects.