[swanmodel-users] boundary condition on fine grid

[nacer <nac...@ya...>]

dear swan users;i perform simulation coupling ww3-swan:grid01:08kmgrid02:03kmgrid03:1kmgrid04:300m
grid2 is the intermediate grid: pass bcs for the grid03,but when grid03 pass bcs for grid04 there is nodata on the boundary for grid04:swan considered as land node and no wave data is offered from the nested SWAN.
why swan considered these points on the boundary of grid04 like land?
can anyone help me?
thanks for allnasser kessali