tarek@tarek-Latitude-E6430:~$ cd /home/tarek/Desktop/BiFeO3/
tarek@tarek-Latitude-E6430:~/Desktop/BiFeO3$ ls
BiFeO3_bands.in   BiFeO3.hub3      BiFeO3.save     BiFeO3.wfc2  input_tmp.in
BiFeO3_bands.out  BiFeO3.hub4      BiFeO3.scf.in   BiFeO3.wfc3
BiFeO3.hub1       BiFeO3.nscf.in   BiFeO3.scf.out  BiFeO3.wfc4
BiFeO3.hub2       BiFeO3.nscf.out  BiFeO3.wfc1     BiFeO3.xml
tarek@tarek-Latitude-E6430:~/Desktop/BiFeO3$ mpirun -np 4 /home/tarek/software/q-e-qe-6.7.0/bin/pw.x <BiFeO3_bands.in> BiFeO3_bands.out
At line 136 of file read_cards.f90
Fortran runtime error: End of file

Error termination. Backtrace:
At line 136 of file read_cards.f90
Fortran runtime error: End of file

Error termination. Backtrace:
At line 136 of file read_cards.f90
Fortran runtime error: End of file

Error termination. Backtrace:
At line 136 of file read_cards.f90
Fortran runtime error: End of file

Error termination. Backtrace:
#0  0xcd31b823960 in ???
#1  0xcd31b8244d9 in ???
#2  0xcd31b82510f in ???
#3  0xcd31ba7817b in ???
#4  0xcd31ba71684 in ???
#5  0xcd31ba722aa in ???
#6  0x5e10c2dfd68f in __read_cards_module_MOD_read_cards
	at /home/tarek/software/q-e-qe-6.7.0/Modules/read_cards.f90:136
#7  0x5e10c2d4948c in __read_input_MOD_read_input_file
	at /home/tarek/software/q-e-qe-6.7.0/Modules/read_input.f90:66
#8  0x5e10c29fe990 in pwscf
	at /home/tarek/software/q-e-qe-6.7.0/PW/src/pwscf.f90:105
#9  0x5e10c29fe69e in main
	at /home/tarek/software/q-e-qe-6.7.0/PW/src/pwscf.f90:40
#0  0x5629d423960 in ???
#1  0x5629d4244d9 in ???
#2  0x5629d42510f in ???
#3  0x5629d67817b in ???
#4  0x5629d671684 in ???
#5  0x5629d6722aa in ???
#6  0x6494b306a68f in __read_cards_module_MOD_read_cards
	at /home/tarek/software/q-e-qe-6.7.0/Modules/read_cards.f90:136
#7  0x6494b2fb648c in __read_input_MOD_read_input_file
	at /home/tarek/software/q-e-qe-6.7.0/Modules/read_input.f90:66
#8  0x6494b2c6b990 in pwscf
	at /home/tarek/software/q-e-qe-6.7.0/PW/src/pwscf.f90:105
#9  0x6494b2c6b69e in main
	at /home/tarek/software/q-e-qe-6.7.0/PW/src/pwscf.f90:40
--------------------------------------------------------------------------
Primary job  terminated normally, but 1 process returned
a non-zero exit code. Per user-direction, the job has been aborted.
--------------------------------------------------------------------------
--------------------------------------------------------------------------
mpirun detected that one or more processes exited with non-zero status, thus causing
the job to be terminated. The first process to do so was:

  Process name: [[54600,1],0]
  Exit code:    2
--------------------------------------------------------------------------