# \[v4.2.x\] Crash in reading namelist \`namsbc\_blk\`

**URL:** <https://nemo-ocean.discourse.group/t/v4-2-x-crash-in-reading-namelist-namsbc-blk/379>\
**Category:** v4.2.x\
**Tags:** SBC\
**Created:** [24 October 2022 09:32 UTC](https://nemo-ocean.discourse.group/t/v4-2-x-crash-in-reading-namelist-namsbc-blk/379 "2022-10-24T09:32:46Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![robinson](https://avatars.discourse-cdn.com/v4/letter/r/848f3c/32.png) [@robinson](https://nemo-ocean.discourse.group/u/robinson)\
**Post date:** [24 October 2022 09:32 UTC](https://nemo-ocean.discourse.group/t/v4-2-x-crash-in-reading-namelist-namsbc-blk/379/1 "2022-10-24T09:32:47Z")

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Hei alla,

I get this crash for unknown reasons when launching Nemo 4.2:

```nohighlight
misspelled variable in namelist namsbc_blk in configuration namelist iostat = 19

```

Although I did not change anything to the namelists…

Any idea ?

Takk for hjelp,

Robinson

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<div class="post-metadata">

**Author:** ![smasson](https://avatars.discourse-cdn.com/v4/letter/s/eb9ed0/32.png) [@smasson](https://nemo-ocean.discourse.group/u/smasson)\
**Post date:** [25 October 2022 10:28 UTC](https://nemo-ocean.discourse.group/t/v4-2-x-crash-in-reading-namelist-namsbc-blk/379/2 "2022-10-25T10:28:57Z")

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Salut Robinson,

According to your error message, the namelist block `namsbc_blk` contains somewhere a variable name which does not correspond to what the code is expected…  
Note it can be either in _namelist\_cfg_ or in _namelist\_ref_. You should have an additional line in your error message telling you which namelist files his creating the error.

You said you did not change anything in the namelist so maybe you changed the code and the namelists you provide are no more corresponding to what nemo is expected…

There is the declaration of the variables expected in `namsbc_bk` (in _src/OCE/SBC/sbcblk.F90_):

```fortran
      NAMELIST/namsbc_blk/ ln_NCAR, ln_COARE_3p0, ln_COARE_3p6, ln_ECMWF, ln_ANDREAS, & ! bulk algorithm
         & rn_zqt, rn_zu, nn_iter_algo, ln_skin_cs, ln_skin_wl, &
         & rn_pfac, rn_efac, &
         & ln_crt_fbk, rn_stau_a, rn_stau_b, & ! current feedback
         & ln_humi_sph, ln_humi_dpt, ln_humi_rlh, ln_tair_pot, &
         & ln_Cx_ice_cst, rn_Cd_i, rn_Ce_i, rn_Ch_i, &
         & ln_Cx_ice_AN05, ln_Cx_ice_LU12, ln_Cx_ice_LG15, &
         & cn_dir, &
         & sn_wndi, sn_wndj, sn_qsr, sn_qlw , & ! input fields
         & sn_tair, sn_humi, sn_prec, sn_snow, sn_slp, &
         & sn_uoatm, sn_voatm, sn_cc, sn_hpgi, sn_hpgj

```

Seb

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<div class="post-metadata">

**Author:** ![robinson](https://avatars.discourse-cdn.com/v4/letter/r/848f3c/32.png) [@robinson](https://nemo-ocean.discourse.group/u/robinson)\
**Post date:** [25 October 2022 11:09 UTC](https://nemo-ocean.discourse.group/t/v4-2-x-crash-in-reading-namelist-namsbc-blk/379/3 "2022-10-25T11:09:43Z")

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Hei Seb,

Thanks, I checked and indeed found a mismatch between namelists and code. This is strange because I have changed nothing to the code. I’m checking again and will send my findings.

Merci pour ton aide,

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<div class="post-metadata">

**Author:** ![robinson](https://avatars.discourse-cdn.com/v4/letter/r/848f3c/32.png) [@robinson](https://nemo-ocean.discourse.group/u/robinson)\
**Post date:** [26 October 2022 08:13 UTC](https://nemo-ocean.discourse.group/t/v4-2-x-crash-in-reading-namelist-namsbc-blk/379/4 "2022-10-26T08:13:11Z")

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Hei Seb,

I checked and I believe there is a bug somewhere in the version control.  
Here is what I did:

```shell
$ git clone --branch 4.2.0 https://forge.nemo-ocean.eu/nemo/nemo.git nemo_4.2.0
$ cd nemo_4.2.0
$ git checkout -b master
$ git pull origin branch_4.2

```

In the config SPITZ12, there is _namelist\_cfg_ which has the variables:

```fortran
ln_Cd_L12 = .false. ! air-ice drags = F(ice concentration) (Lupkes et al. 2012)
ln_Cd_L15 = .true. ! air-ice drags = F(ice concentration) (Lupkes et al. 2015)

```

that exist nowhere in the code…

Voilà, voilà,

Robinson

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<div class="post-metadata">

**Author:** ![smasson](https://avatars.discourse-cdn.com/v4/letter/s/eb9ed0/32.png) [@smasson](https://nemo-ocean.discourse.group/u/smasson)\
**Post date:** [28 October 2022 10:02 UTC](https://nemo-ocean.discourse.group/t/v4-2-x-crash-in-reading-namelist-namsbc-blk/379/5 "2022-10-28T10:02:46Z")

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Yes, you are right, SPITZ12 namelist\_cfg is outdated.  
`ln_Cd_L12` must be replaced by `ln_Cx_ice_LU12`  
`ln_Cd_L15` must be replaced by `ln_Cx_ice_LG15`  
I will change this

Seb