In License Selection dialog when switch from ProStructures to ProSteel license the following message come
And same when switch to ProConcrete the below message showing
This message is nothing but the information to user that under selected license( if selected other than ProStructures) another license will not work. This message is added in ProStructures CONNECT Edition.So the user need to say ok and can proceed working in that selected license. In that case no any tool of other license ( ProSteel / ProConcrete) will not work.