Error (73) - floating divide in zero

[Liem Nguyen Duy]

Dear all,

I am using SWAT model 2012 version 581 (ArcSWAT 2012.10.2).

When I run SWAT, I have error <73>: floating divide in zero which you can see in the figure below.

I also attach my TxtInOut folder.

I am looking forward to hearing ideas from all of you.

anyone can give me a solution.

Thanks in advance.

Best regards,

Liem

[Jaya Pudashine]

Have you solved your problem . I am also facing the same problem

[Jaya Pudashine]

I had tried changing the ET Method to Hargreaves and it is working now. But I don't want to use that method...

On Tuesday, November 13, 2012 5:05:01 PM UTC+7, nguyenduy wrote:

[Janne Helin]

Hi,

I am getting this error in SWAT CUP. I have been using SUFI for flow calibration, but after including calibration for the nitrogen load I started bumping into this error message. It started with the third simulation after the two year warm-up period, but subsequent changes (removing  N weight from objective function and the denitrication parameters from calibration) lead to the problem already at first simulation.  To get further than the first simulation I recopied txtout contents from ArcSWAT.  Is it an obvious error following from a bad choice of parameters to calibrate (SDNCO and CDN) or is there something else happening here that is confusing me?  Regarding the N parameters themselves I had:

v__CDN.bsn                 0.0001         3
v__SDNCO.bsn               0.0001       1

I tried manual calibration with SDNCO = 1 and CDN = 0.1 and I am still getting unexpectedly high denitrification and as an outcome too little nitrates to water flows. This makes me wonder if ITDRN (tile drainage) and IWTDN (water table) are properly programmed to function with denitrifcation processes or is it my soil data which is bad. Also, when the parameter range is set to be  between 0-1 and then default is 1.1, it makes me think that maybe the model developers are not trusting this part of the model to operate as it should.

-Janne Helin