portal peb (4).std
If you go to Utilities -> Structure Tools -> Multiple Structures you will see that many separate structures are listed in your model. This indicates that some members are not connected correctly between each other. The quickest way to fix this is to select all members (except bracings) and go to Geometry -> Intersecting Beams -> Intersect Selected Beams.
Thank you so much for your reply...now it is corrected...