When importing an EDIF netlist, you must specify your EDIF flavor. Your choices are
GENERIC - For any non-Viewlogic and Mentor Graphics netlists
VIEWLOGIC - For Viewlogic EDIF netlists
MGC - For Mentor Graphics EDIF netlists
Select the flavor that you wish to use with your design and click OK.
Select the Use these options as default check box if you do not want to be asked about this option again.