In Rhapsody, property to set FlowPort visibility is "CPP_CG::Relation::DataMemberVisibility".
By default, visibility of FlowPort is set to "private" in Rhapsody, while it is set to "public" in MagicDraw.
By setting the option rhp2md.semantic.flow_ports.visibility.public
in the properties.ini, All FlowPort visibilities will be set to "public".
To transform Rhapsody FlowPort visibility (as defined in Rhapsody), set to following option in publisher.ini file:
-Drhp2md.semantic.flow_ports.visibility.public=false
To force FlowPort visibility to "public", set to following option in publisher.ini file:
-Drhp2md.semantic.flow_ports.visibility.public=true