topic Re: Generate CN grid error in Water Resources Questions

Generate CN grid error

FaidessMwale — Mon, 21 May 2012 11:43:35 GMT

I posted this thread some time last week but I have had no feedback. I have tried emptying the TEMP folder but still nothing works. So I have decided to post it again .

want to generate a curve number grid using HEC-GeoHMS 5 which I just installed. I have arcmap 9.3.1 and archydro 1.4. Whe I use the Generate CN grid tool, I get an error that says
" Aplayer is not defined for .... Run Create ArcHydro configuration function and try again".

the layers am using were generated using archydro 1.3 which I uninstalled. I added the ArcHydro tools to arctool box and when i open it, there is no "create arc hydro configuration function" nor does ArcHydro settings appear in the environment settings. This is contrary to ArcHydro GP Tools 1.4 Tutorial.

Can someone help please

Fai

Re: Generate CN grid error

AliAkel — Mon, 21 May 2012 21:16:10 GMT

Try: ArcHydro toolbar > ApUtilities > Additional Utilities > Configure Function Parameters.

Re: Generate CN grid error

FaidessMwale — Tue, 22 May 2012 15:57:24 GMT

Thank you for the suggestion

I used configure function parameters with application as "HydroConfig", function group as "watershed parameters" and configuration as "archydro tools" but it did not work. I repeated the procedure with ApNconfing and Default Config but still cant get over the error. I also tried to work with "set target locations" for all the 3 nodes but all in vain. I have attached the error am getting; may be it will shed more light.

Thank you

Re: Generate CN grid error

nitzanneeman — Thu, 05 Jul 2012 08:10:06 GMT

I just had some experiece with creating a CN grid myself and run into verious errors...
in the end my problem was that I had to make sure the type of the fields in the union layer were integer/float! (the landuse and PctA/B/C/D fields). after that the CN was generated.

hope you have luck with it!

nitzan

Re: Generate CN grid error

Ziaulhaq2282 — Sat, 21 Oct 2023 12:00:17 GMT

It is numerous tries that I did to generate CNGrid, but always faced errors such as (System.NullReferenceException: Object reference not set to an instance of an object.). I checked the steps many times, I followed correctly the steps in videos on youtube. if you can help me, so please. thank you