annscholz

CN Grid Creation

Discussion created by annscholz on Mar 23, 2011
Latest reply on Feb 6, 2014 by mogiet
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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