Error in ungrib.exe

[CalmTide]

Hello, I am trying to run ungrib.exe and encountered the error below:

(base) jamiu@jamiu-OMEN-by-HP-Laptop-15-ce0xx:~/Build_WRF/WPS/ungrib$ ./ungrib.exe
./ungrib.exe: error while loading shared libraries: libpng12.so.0: cannot open shared object file: No such file or directory

I have re-installed my libpng but the error persist. Kindly help.

Thanks

 

[William.Hatheway]

Hello, I am trying to run ungrib.exe and encountered the error below:

(base) jamiu@jamiu-OMEN-by-HP-Laptop-15-ce0xx:~/Build_WRF/WPS/ungrib$ ./ungrib.exe
./ungrib.exe: error while loading shared libraries: libpng12.so.0: cannot open shared object file: No such file or directory

I have re-installed my libpng but the error persist. Kindly help.

Thanks

Did you remember to export the locations of the files to path and ld library parh

 

[CalmTide]

Thanks for your response, Williams.
Yes, I linked all the necessary files and library according to the User's guide. Take a look at my fnl and other files linked in the image below.
However, i noticed something. Softlinked.exe files (I mean, ln -sf ..) don't usually work on my system. What i do some times is to copy the executable to the linking directory. What could be the cause for that. It could be the reason I'm having this issue.
Thank you

 

[William.Hatheway]

#running ungrib with maximum limit of 2 cores
#linking GFS data files to grib
#linking Vtable for GFS to WRF/run vtable
ln -sf ungrib/Variable_Tables/Vtable.GFS ./Vtable
./link_grib.csh $WRFROOT/GFS/
./ungrib.exe

not sure if this will help you but this is what I do for my GFS run.

#setting environment for WRF model to run
export LD_LIBRARY_PATH=/home/workhorse/WRF/Libs/NETCDF/lib:$LD_LIBRARY_PATH
export LD_LIBRARY_PATH=/home/workhorse/WRF/Libs/grib2/lib:$LD_LIBRARY_PATH
export PATH=/home/workhorse/WRF/Libs/MPICH/bin:$PATH
export PATH=/home/workhorse/WRF/Libs/grib2/lib:$PATH

 

[Ming Chen]

I think you may need to add the directory containing the 'libpng12.so.0' file to your LD_LIBRARY_PATH environment variable. i.e. (in c-shell):
setenv LD_LIBRARY_PATH /full_path_to_your_libpng_lib:$LD_LIBRARY_PATH

 

[CalmTide]

#running ungrib with maximum limit of 2 cores
#linking GFS data files to grib
#linking Vtable for GFS to WRF/run vtable
ln -sf ungrib/Variable_Tables/Vtable.GFS ./Vtable
./link_grib.csh $WRFROOT/GFS/
./ungrib.exe

not sure if this will help you but this is what I do for my GFS run.

#setting environment for WRF model to run
export LD_LIBRARY_PATH=/home/workhorse/WRF/Libs/NETCDF/lib:$LD_LIBRARY_PATH
exyport LD_LIBRARY_PATH=/home/workhorse/WRF/Libs/grib2/lib:$LD_LIBRARY_PATH
export PATH=/home/workhorse/WRF/Libs/MPICH/bin:$PATH
export PATH=/home/workhorse/WRF/Libs/grib2/lib:$PATH

Thank you for the guidance, Williams. I'll implement your instructions and feed you back

 

[CalmTide]

I think you may need to add the directory containing the 'libpng12.so.0' file to your LD_LIBRARY_PATH environment variable. i.e. (in c-shell):
setenv LD_LIBRARY_PATH /full_path_to_your_libpng_lib:$LD_LIBRARY_PATH

Thanks so much, Ming.
Do I have to reinstall the libpng library after adding the path as you suggested?

 

[CalmTide]

Thanks so much, Ming.
Do I have to reinstall the libpng library after adding the path as you suggested?

Thank you for the guidance, Williams. I'll implement your instructions

 

[CalmTide]

I have implemented the suggested solutions yet it did not work.
I went back to the config. file of the library "libpng" attached and discovered an error.
It's the key reason I can't run ungrib.exe. Kindly check it for me.
Thanks and regards

 

[Ming Chen]

Please reinstall libpng, then add its path to your LD_LIBRARY_PATH.

 

[CalmTide]

Thanks everyone for your guides. I reinstalled libpng library yet it did not work.
I reinstalled mpich then libpng to the end according to the installation guide.
Now I can link files successfully and run all WPS programs

 

[William.Hatheway]

Thanks everyone for your guides. I reinstalled libpng library yet it did not work.
I reinstalled mpich then libpng to the end according to the installation guide.
Now I can link files successfully and run all WPS programs

great news that you got it to work

 

[CalmTide]

great news that you got it to work

Yes Williams..thanks a lot for your guidance