Problem running WRF-4DVar Tutorial

[Liliputian_123]

Im currently using WRFDA v 4.2.2 and tested the tutorial based on the Chapter 6:
https://www2.mmm.ucar.edu/wrf/users/docs/user_guide_v4/v4.2/users_guide_chap6.html#_Generic_BE_option:


The WRF3DVar test run works fine but the 4DVar test run stops. Attached are the namelist.input and the rsl files. I get the following error:

d01 2008-02-05_12:00:00  This input data is not V4:  OUTPUT FROM REAL_EM V3.9pre#2 PREPROCESSOR
d01 2008-02-05_12:00:00  Input data is acceptable to use: wrfbdy_d01
Timing for processing lateral boundary for domain        1:    0.01577 elapsed seconds
 Tile Strategy is not specified. Assuming 1D-Y
WRF TILE   1 IS      1 IE     45 JS      1 JE     20
WRF NUMBER OF TILES =   1
d01 2008-02-05_12:00:00           29  points exceeded cfl=2 in domain d01 at time 2008-02-05_12:00:00 hours
d01 2008-02-05_12:00:00  MAX AT i,j,k:            2           2          40  vert_cfl,w,d(eta)=   3.86428766786514        9.24332288941412       5.775456056663203E-003
Timing for main: time 2008-02-05_12:06:00 on domain   1:    0.48507 elapsed seconds
forrtl: severe (174): SIGSEGV, segmentation fault occurred
Image              PC                Routine            Line        Source
libpnetcdf.so.4.0  000015258AB4CDB9  for__signal_handl     Unknown  Unknown
libpthread-2.28.s  0000152588333B20  Unknown               Unknown  Unknown
da_wrfvar.exe      0000000004CB7461  Unknown               Unknown  Unknown
da_wrfvar.exe      0000000004CB2A42  Unknown               Unknown  Unknown
da_wrfvar.exe      0000000004CB0BBC  Unknown               Unknown  Unknown
da_wrfvar.exe      0000000004F77866  Unknown               Unknown  Unknown
da_wrfvar.exe      0000000003DEE4C5  Unknown               Unknown  Unknown
da_wrfvar.exe      0000000002CFA572  Unknown               Unknown  Unknown
da_wrfvar.exe      0000000002A64692  Unknown               Unknown  Unknown
da_wrfvar.exe      00000000019C9BA6  Unknown               Unknown  Unknown
da_wrfvar.exe      000000000041580B  Unknown               Unknown  Unknown
da_wrfvar.exe      000000000049F7CC  Unknown               Unknown  Unknown
da_wrfvar.exe      000000000043AB2E  Unknown               Unknown  Unknown
da_wrfvar.exe      0000000000434702  Unknown               Unknown  Unknown
da_wrfvar.exe      0000000000413C6D  Unknown               Unknown  Unknown
da_wrfvar.exe      0000000000413BE2  Unknown               Unknown  Unknown
libc-2.28.so       0000152587F817B3  __libc_start_main     Unknown  Unknown
da_wrfvar.exe      0000000000413AEE  Unknown               Unknown  Unknown

Reducing the time step or specifying the epssm to 0.2 or 0.3 didnt solve the problem.
I already tried everything mentioned here but still not working!
https://forum.mmm.ucar.edu/phpBB3/viewtopic.php?f=73&t=133

Did I miss something in the namelist? I'll appreciate any help on this matter.