Hi,
I'm assuming that you are not using OA format for the routing tools.
How about using streamOut command if you want to export the physical data?
This command outputs the physical shape data in GDS2 format (remember to map layers correctly).
For connectivity & instance name information, you need to output the netlist also.
I haven't done this before but this is what comes to mind.
Migration between tools can be a major headache, especially when the technology files have slightly differing info.
Best Regards,
I-FAB