Problem posting order

Hello, would anyone like to help me on this problem

This problem appears when you do complete the order - Post Line. Version of NAV is 5.0. Аsk for assistance for which advance thanks!

I think you must be give value in the"Apply to Vehicle No." field

go to line see Apply to vehicle no filed if it wont shows there go to show columns and see there and fill the value in line no :0
may be it work