warning No 95

Hi,
I have built a model with couple of control structures and culverts. now when I try to run the model, this messege is coming up : structure ignored at branch[i]( Branch Name)[/i] , chainage ([i]There is no chainage)[/i]  since branch is unknown. I have checked every thing, every thing looks Ok but still I have a problem! Any help?
Cheers

Answer : There was an inconsistency between my network file and cross section file. I just opened the network file by notepad and fixed the problem.