Importing Civilstorm Standalone Network into ORD Civilstorm (for Microstation) blank file

I have a storm sewer network that was created using the Civilstorm standalone version. I'd like to import the network into a blank ORD file, but I keep getting the following error "ImportNotAllowedInNonEmptyModel" when I go to IMPORT UTILITIES -> IMPORT OPENFLOWS MODEL. Assuming that's the correct workflow, am I missing something?