With Business Object Modeler, you can import only XML, UML, WSDL and EDI files. In order to import these files, you need to press the Import button from the File menu and to follow the on-screen instruction. You can check the file format of your "Edifact message" if you right-click the file, select Properties, open the General tab and check the information next to Type of file. I suggest you contact Axway GmbH for further information.