How route is determined in STO (UB type)

Dear Experts,

We have created STO with UB type
i configured route with below combination but in po route is not getting determined.
Departure country in shipping point : IN
Transportation zone shipping point : : AP
Shipping condition : 30
transportation group :00005
Destination country in ship to party : IN
Transportation one in ship to party : CALCUTTA

below is the entry in TROLZ table but this route is not getting determined.
IN+AP+0005+IN+30+CALCUTTA = route T00050