[ncl-talk] could not find ESMF_RegridWeightGen executable

[Dave Allured - NOAA Affiliate]

This is a path setup problem.  Look inside ESMF_regridding.ncl, lines
2739-2754.  There are two different ways to access the executable
ESMF_RegridWeightGen.  Either that must be in a directory included in your
normal PATH variable, or else the optional shell variable ESMFBINDIR can be
used to specify the directory containing ESMF_RegridWeightGen.

ESMFBINDIR takes priority.  If this variable is set incorrectly, then NCL
will not look in your regular PATH, and you will get that error.

For most installations, I recommend including the path to ESMF in your
regular PATH variable, and make sure that ESMFBINDIR is *NOT SET*.  But use
ESMFBINDIR if you need to keep ESMF out of your normal PATH for some reason.

Since NCL uses subshells, it may be helpful to diagnose this problem using
subshells while NCL is actually running.  Use these commands from the NCL
command prompt, to examine your current NCL environment.  The "which"
command uses your PATH and is not aware of ESMFBINDIR.

    system ("echo $PATH")
    system ("echo $ESMFBINDIR")
    system ("which ESMF_RegridWeightGen")


On Thu, Mar 18, 2021 at 10:12 AM Laura Fowler via ncl-talk <
ncl-talk at mailman.ucar.edu> wrote:

> Hi Jiali:
>
> I ran your script regrid_36.ncl without any issue at all (see attached the
> output file regrid_36.out) and all the nc files were properly built. The
> only thing that I can think of is that the ESMF library is not available,
> or not properly built, or not properly accessed on the machine that you are
> using. To see that it is indeed the case, you should try running ESMF_RegridWeightGen
> from the command line of your terminal window:
>
> ESMF_RegridWeightGen --ignore_degenerate  --source EDGAR_SCRIP.nc
> --destination WRF_SCRIP.nc --weight EDGAR_to_WRF_conserve.nc --method
> conserve --src_regional --dst_regional -i --norm_type fracarea
>
> That will give you more information as to why you cannot find
> ESMF_RegridWeightGen?
>
> Laura
>
>
> On Thu, Mar 18, 2021 at 9:53 AM Wang, Jiali <jialiwang at anl.gov> wrote:
>
>> Thank you Laura.
>>
>>
>>
>> I have loaded ESMF_regridding.ncl in my ncl script, this means the ncl
>> function ESMF_regrid_with_weights is there, and this function will call
>> ESMF_RegridWeightGen.
>>
>>
>>
>> The problem is when it’s trying to call ESMF_RegridWeightGen, it
>> couldn’t find the executable, but I can see the executable is in the same
>> path as ncl.
>>
>>
>>
>> I am attaching my ncl script and the data I am using. Can you please take
>> a look and advise?
>>
>>
>>
>> Thanks again!
>>
>> Jiali
>>
>>
>>
>> *From: *"laura at ucar.edu" <laura at ucar.edu>
>> *Date: *Thursday, March 18, 2021 at 10:18 AM
>>
>>
>>
>> Hi Jiali:
>>
>>
>>
>> The function ESMF_RegridWeightGen executable is part of the ESMF library
>> and is not a ncl function: that is the reason why you did not find it in
>> the ncl source code itself. It is the ncl function ESMF_regrid_with_weights
>> that calls the ESMF_RegridWeightGen (that ncl function is in the large ncl
>> script ESMF_regridding.ncl.) So your ncl script should
>> call ESMF_regrid_with_weights, not ESMF_RegridWeightGen.
>>
>>
>>
>> Hope this helps,
>>
>> Laura
>>
>>
>>
>>
>>
>> On Thu, Mar 18, 2021 at 6:17 AM Wang, Jiali via ncl-talk <
>> ncl-talk at mailman.ucar.edu> wrote:
>>
>> Hi,
>>
>>
>>
>> I have been trying on different suercomputers, and all of them look fine
>> (ncl and the excutable are at the same place), but it still says can’t find
>> ESMF_RegridWeightGen executable. I am doing exactly the same thing as this.
>>
>>
>>
>> https://www.ncl.ucar.edu/Applications/Scripts/ESMF_regrid_36.ncl
>>
>>
>>
>> Can anyone advise please?
>>
>> Thanks
>>
>> Jiali
>>
>>
>>
>> *From: *Jiali Wang <jialiwang at anl.gov>
>> *Date: *Wednesday, March 17, 2021 at 11:39 AM
>>
>> Hi NCL users!
>>
>> I am having a problem running a regrid script.
>>
>> It says “could not find ESMF_RegridWeightGen executable” after generating
>> the source_grid_file and destination_grid_file and before generating the
>> weights.
>>
>> Here is what I got (by following up this link
>> https://mailman.ucar.edu/pipermail/ncl-talk/2018-April/011949.html), it
>> seems everything is at the same place but it just can’t find it.
>>
>> (ncl_stable) [jialiwang at beboplogin4 regrid_test]$ which ncl
>>
>> /soft/anaconda3/5.2.0/envs/ncl_stable/bin/ncl
>>
>> (ncl_stable) [jialiwang at beboplogin4 regrid_test]$ ncl -V
>>
>> 6.6.2
>>
>> (ncl_stable) [jialiwang at beboplogin4 regrid_test]$ env | grep NCARG
>>
>> *NCARG*_ROOT=/soft/anaconda3/5.2.0/envs/ncl_stable
>>
>> (ncl_stable) [jialiwang at beboplogin4 regrid_test]$ which
>> ESMF_RegridWeightGen
>>
>> /soft/anaconda3/5.2.0/envs/ncl_stable/bin/ESMF_RegridWeightGen
>>
>>
>>
>> Any suggestions would be appreciated!
>>
>>
>>
>> Jiali
>>
>>
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