Import on target unable to connect to export on source.
Event log had following message
Warning 2008-12-16 13:47:17.048330 21957 4141061824 Cop: unable to retrieve hostname for connected host [module cop]
1) Wrong IP address of the source system was specified in the etc/hosts file
1) etc/hosts file should have the IP address and host name of the server which needs to be connected.