Import design innovus

Dear all,

I have saved a synthesized design in genus using the write_design -basename basename -innovus and when I import the design into innovus I see that it has not connected some output ports. When invoking the schematic viewer in innovus several warnings appear related to those ports: WARN: (IMPSGN-2007) Failed to open Port  XXXXX. I have checked the verilog generated by genus and looks correct and furthermore Genus reads in he file correctly. I do not have any clue on what can be happening. Do you know what can be the problem?

Thanks in advance,

Luis.