Dear Peter,

       Thanks a lot. I have partially solved the problem. The issue was not with regcm.in file.  The problem is that I am unable to run the model with intel fortran compiler. With GNU compilers (gfortran, gcc etc.), the model runs without any problem.

However, I have tried on different computers (including HPC's) but I am unable to run latest version of the model with intel fortran compiler. I am using Intel fortran compiler version 2019.3.199.  I don't get any error in first three steps namely Terrain, SST, ICBC. When I finally submit the simulation on single or multiple processor, I get error "forrtl: severe (174): SIGSEGV, segmentation fault occurred". I have also compiled with --enable-debug but still not luck. See image file showing error in the attachment or here:

****** Error Message *********

 Opening new output file
 /home/imran/Workdir/RegCM/RegCM-4.7.0/Run//SA46ifc_ATM.2015010100.nc
 Opening new output file
 /home/imran/Workdir/RegCM/RegCM-4.7.0/Run//SA46ifc_SRF.2015010100.nc
 Opening new output file
 /home/imran/Workdir/RegCM/RegCM-4.7.0/Run//SA46ifc_STS.2015010100.nc
 Opening new output file
 /home/imran/Workdir/RegCM/RegCM-4.7.0/Run//SA46ifc_RAD.2015010100.nc
 ATM variables written at  2015-01-01 00:00:00 UTC       
 At  2015-01-01 00:00:00 UTC       
 JDay      0.00000 solar declination angle = -23.11755569 degrees
                   solar TSI irradiance    =    1360.9279 W/m^2
forrtl: severe (174): SIGSEGV, segmentation fault occurred
Image              PC                Routine            Line        Source            
regcmMPI           0000000000CA0D02  for__signal_handl     Unknown  Unknown
libpthread-2.27.s  00007FEDB2748890  Unknown               Unknown  Unknown
regcmMPI           00000000007D369B  Unknown               Unknown  Unknown

Best Regards

Imran