Error4: make_polyline failed -5001

I'm trying to import a CRD file using "Field to Finish", and it seems to import the points okay, but when it goes to connect the points I get the following error:
Error4: make_polyline failed -5001
Any ideas why or where to start troubleshooting?
Error4: make_polyline failed -5001
Any ideas why or where to start troubleshooting?