# An error occurred while running megan31 fert models:stop 'bio\_emiss abort' **URL:** \ **Category:** MEGAN\ **Created:** [September 11, 2020, 6:37am UTC](https://forum.cmascenter.org/t/an-error-occurred-while-running-megan31-fert-models-stop-bio-emiss-abort/1767 "2020-09-11T06:37:15Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![xenos\_an](https://avatars.discourse-cdn.com/v4/letter/x/e9bcb4/32.png) [@xenos\_an](https://forum.cmascenter.org/u/xenos_an)\ **Post date:** [September 11, 2020, 6:37am UTC](https://forum.cmascenter.org/t/an-error-occurred-while-running-megan31-fert-models-stop-bio-emiss-abort/1767/1 "2020-09-11T06:37:15Z")
Hi all, I am learning and testing megan31 and have completed three modules: Lai / ecotype / grwform. When I try to run prepmegan4cmaq\_ fert. x, I got the error message: stop bio\_emiss abort. I checked it out fert.log But I don’t know what the problem is. I hope I can get some hints. ``` wrf_file: MAP_PROJ is not polar stereographic wrf_file: CEN_LON = 110.817413 wrf_file: CEN_LAT = 37.7843323 wrf_file: STAND_LON = 112.330002 wrf_file: TRUELAT1 = 25.0000000 wrf_file: TRUELAT2 = 47.0000000 wrf_file: DX = 3000.00000 proj_init: projection = 1 proj_init: proj%hemi = 1.00000000 proj_init: proj%rebydx = 2123.33325 proj_init: proj%polei,j = 114.499680 2906.11963 proj_init: west-east,south-north = 141 240 wrf domain corners --- ------ ------- sw corner @ ( 108.54730 , 34.448158 ) se corner @ ( 113.21362 , 34.505753 ) ne corner @ ( 113.29285 , 41.069546 ) nw corner @ ( 108.20862 , 41.007008 ) %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% wrf_file: grid dimensions wrf_file: ids,ide,jds,jde 1 141 1 240 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Reading megan2 bio emiss file soil_fert_001.nc megan2_bioemiss: nlon_megan, nlat_megan = 720 360 megan2_bioemiss: data_dx,dx,has_area_map = 55588.7344 3000.00000 F megan2_bioemiss: file soil_fert_001.nc has a new grid megan2_bioemiss: model lon limits = 108.2086181640625 113.2928466796875 megan2_bioemiss: model lat limits = 34.44815826416016 41.07315826416016 megan2_bioemiss: megan lon limits = -179.7500000000000 179.7500000000000 megan2_bioemiss: megan lat limits = -89.75000000000000 89.75000000000000 megan2_bioemiss: count of points <,> data min,max lat = 0 xndx_megan = 576 588 megan2_bioemiss: count of points < data min lat = 0 megan2_bioemiss: count of points > data max lat = 0 yndx_megan = 249 263 ``` ---
**Author:** ![cjcoats](https://avatars.discourse-cdn.com/v4/letter/c/ac8455/32.png) [@cjcoats](https://forum.cmascenter.org/u/cjcoats)\ **Post date:** [September 11, 2020, 11:31am UTC](https://forum.cmascenter.org/t/an-error-occurred-while-running-megan31-fert-models-stop-bio-emiss-abort/1767/2 "2020-09-11T11:31:41Z")
Are you modeling teh area around Hothot, Baotou, Dongsheng, and Yuin in China, rather a bit to the west of Beijing? That’s where your latitude-bounds put you… for which there seems to be no data in your input-data. ---
**Author:** ![xenos\_an](https://avatars.discourse-cdn.com/v4/letter/x/e9bcb4/32.png) [@xenos\_an](https://forum.cmascenter.org/u/xenos_an)\ **Post date:** [September 11, 2020, 1:07pm UTC](https://forum.cmascenter.org/t/an-error-occurred-while-running-megan31-fert-models-stop-bio-emiss-abort/1767/3 "2020-09-11T13:07:27Z")
Thank you for your reply, but the data I tested is the worldwide soil nitrogen emission module inputs downloaded by UCI BAI. [https://bai.ess.uci.edu/megan/data-and-code#h.p\_MkLqw8QBi\_F-](https://bai.ess.uci.edu/megan/data-and-code#h.p_MkLqw8QBi_F-) ---
**Author:** ![amirdudu](https://avatars.discourse-cdn.com/v4/letter/a/bcef8e/32.png) [@amirdudu](https://forum.cmascenter.org/u/amirdudu)\ **Post date:** [January 17, 2022, 2:19pm UTC](https://forum.cmascenter.org/t/an-error-occurred-while-running-megan31-fert-models-stop-bio-emiss-abort/1767/4 "2022-01-17T14:19:07Z")
Dear @xenos_an, I am facing the same issue and I was wondering if you found a way to make it work. I run the program in debug mode and this is what it says: ```auto 1 12 ./input/wrfout_d02_2020-12-24_00:00:00 /home/amir/megan32/MEGAN32_Prep_Code_Jan_2022 13 94 238 190 wrf_file: MAP_PROJ is not polar stereographic wrf_file: CEN_LON = 53.8499985 wrf_file: CEN_LAT = 31.8499832 wrf_file: STAND_LON = 53.9319992 wrf_file: TRUELAT1 = 32.2280006 wrf_file: TRUELAT2 = 0.00000000 wrf_file: DX = 12000.0000 proj_init: projection = 3 proj_init: proj%hemi = 1.00000000 proj_init: proj%rebydx = 530.833313 proj_init: proj%polei,j = 0.00000000 0.00000000 proj_init: west-east,south-north = 237 189 wrf domain corners --- ------ ------- sw corner @ ( 38.793961 , 21.139252 ) se corner @ ( 68.906036 , 21.139252 ) ne corner @ ( 68.906036 , 41.448868 ) nw corner @ ( 38.793961 , 41.448868 ) %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% wrf_file: grid dimensions wrf_file: ids,ide,jds,jde 1 237 1 189 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% month= 1 Reading megan2 bio emiss file soil_nitrogen_mon01.nc megan2_bioemiss: nlon_megan, nlat_megan = 288 192 megan2_bioemiss: data_dx,dx,has_area_map = 104774.289 12000.0000 F megan2_bioemiss: file soil_nitrogen_mon01.nc has a new grid megan2_bioemiss: model lon limits = 38.79396057128906 68.90603637695312 megan2_bioemiss: model lat limits = 21.13925170898438 41.44886779785156 megan2_bioemiss: megan lon limits = -180.0000000000000 178.7500000000000 megan2_bioemiss: megan lat limits = -90.00000000000000 90.00000000000000 megan2_bioemiss: count of points <,> data min,max lat = 0 xndx_megan = 176 201 megan2_bioemiss: count of points < data min lat = 0 megan2_bioemiss: count of points > data max lat = 0 yndx_megan = 118 141 megan2_bioemiss: bilinear interp diagnostics megan2_bioemiss: ix 176 177 megan2_bioemiss: ax 3.51684578E-02 0.964831531 megan2_bioemiss: megan lons 38.7500000 40.0000000 megan2_bioemiss: wrf lon = 38.7939606 megan2_bioemiss: jy 118 119 megan2_bioemiss: by 0.931094110 6.89058900E-02 megan2_bioemiss: megan lats 20.2617798 21.2041893 megan2_bioemiss: wrf lat = 21.1392517 STOP diagnostics ``` ---
**Author:** ![amirdudu](https://avatars.discourse-cdn.com/v4/letter/a/bcef8e/32.png) [@amirdudu](https://forum.cmascenter.org/u/amirdudu)\ **Post date:** [January 19, 2022, 10:37pm UTC](https://forum.cmascenter.org/t/an-error-occurred-while-running-megan31-fert-models-stop-bio-emiss-abort/1767/5 "2022-01-19T22:37:03Z")
I have found the solution to this error so I am posting it here just in case someone needs it. The problem is with grid resolution of some of MEGAN input files (like soil\_nitrogen\_\* and soil\_fert\_\*). In order to solve the issue you need to regrid the input files to a finer grid using any means that you are familiar with. I used the following cdo commands: **cdo -f nc -sellonlatbox,lon1,lon2,lat1,lat2 -random,r7200x3600 template.nc** where lat1,2 and lon1,2 are the bounds of your modeling area. This creates a template nc file with 0.01 degree resolution. Next regrid your files using the following command: **cdo -remapcon,** **template.nc** **input.nc** **output.nc**