I am having trouble computing Live Loads on the substructure of a simple span bridge. When I click on LL Details in the loads window I get the message "Invalid loads - No bearing loads." I have already run my superstructure analysis and am getting live load reactions at the supports like you would expect. I don't understand why the live loading from my superstructure is not being passed to the substructure module. Any help would be much appreciated. Thank you,

Andrew V.