topic ArcMap v10.3 - Adding relationshipClass into a map from ArcCatalog in Data Management Questions https://community.esri.com/t5/data-management-questions/arcmap-v10-3-adding-relationshipclass-into-a-map/m-p/617192#M34857 <HTML><HEAD></HEAD><BODY><P>Hi, </P><P></P><P>I am wondering why it's possible to add a relationshipClass from the catalog into a map in ArcMap 10.3 only when the cardinality is M-N (many-to-many). When I try to drag and drop other relationshipClass with cardinality (1-1 or 1-M) I have the following error:</P><P></P><P>Could not add the specified data object to the map.</P><P></P><P>Thanks for the info,</P><P></P><P>Maxime</P></BODY></HTML> Thu, 07 Mar 2019 15:57:55 GMT MaximeDemers 2019-03-07T15:57:55Z ArcMap v10.3 - Adding relationshipClass into a map from ArcCatalog https://community.esri.com/t5/data-management-questions/arcmap-v10-3-adding-relationshipclass-into-a-map/m-p/617192#M34857 <HTML><HEAD></HEAD><BODY><P>Hi, </P><P></P><P>I am wondering why it's possible to add a relationshipClass from the catalog into a map in ArcMap 10.3 only when the cardinality is M-N (many-to-many). When I try to drag and drop other relationshipClass with cardinality (1-1 or 1-M) I have the following error:</P><P></P><P>Could not add the specified data object to the map.</P><P></P><P>Thanks for the info,</P><P></P><P>Maxime</P></BODY></HTML> Thu, 07 Mar 2019 15:57:55 GMT https://community.esri.com/t5/data-management-questions/arcmap-v10-3-adding-relationshipclass-into-a-map/m-p/617192#M34857 MaximeDemers 2019-03-07T15:57:55Z