I???m working with HEC-GeoHMS to perform the operation of building a CNGrid. It is a HMS Project View Utility function. I performed it successfully about four months ago on my project. Now I have a new landuse/soil shape file and CNLookUp table for a built out watershed. I get an APFramework error that says ???Required/MustExist Field: Value is not found ??? CNLookUP???. I have been over the table enough times to know nothing is missing. The CN field is generated in the attribute table for the Landuse_Soil file but all the values are zero. Any suggestions? FYI - I tried to rebuild the grid that was done successfully last fall and got the same error message.
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