In GeoHMS through ArcMap extensions:
I have computed the CN Grids and try to use (Subbasin parameters from Raster) and then compute CN Lag, but I get errors:
(1) When I try to make Subbasin parameters from Raster, the error "BasinHeader could not be found" appears and I do not know how to solve it.
(2) When I try to compute CN Lag (from Hydrologic parameters tab) the error "compute Flow path for the drainage area and try again" appears, but actually I have computed the Flow Path in earlier stages.