Too many attempts made for this increament

Hi Good evening,

                            I have done same problem which is described in Abaqus video tutorials ie 3D frame static analysis. when i submit the job in the analysis i am getting the error "Too many attempts made for this increments" . In message file it has written that "WARNING: THERE  ARE 2 UNCONNECTED REGIONS IN THE MODEL". how to see this unconnected region? Please can any one tell me how to correct this problem?

thanking you all in advance....