Hello
There are no keyword COMPUTATION CONTINUED in Tomawac it is useless
There are no keyword MESH FILE in Tomawac, it is GEOMETRY FILE
There are no keyword BATHYMETRY FILE in Tomawac, I guess your meant BOTTOM TOPOGRAPHY FILE
There are no keyword WAVE GENERATION, i don't know what your meant
There are no keyword WAVE DISPERSION, i don't know what your meant
There are no keyword GAMMA, There are no keyword OUTPUT FILE.......
In the documentation/tomawac/reference/ you will find a pdf telling you all the keywords that exist in TOMAWAC, may be it is better to read it before writting the steering file.