At line 61 of file mengen.f (unit = 5)
Fortran runtime error: Cannot open file '/dev/tty': No such file or directory

Error termination. Backtrace:

Could not print backtrace: libbacktrace could not find executable to open
#0  0xffffffff
#1  0xffffffff
#2  0xffffffff
#3  0xffffffff
#4  0xffffffff
#5  0xffffffff
#6  0xffffffff
#7  0xffffffff
#8  0xffffffff
#9  0xffffffff
#10  0xffffffff
#11  0xffffffff

C
  OPEN(UNIT=10, FILE= 'meangen.out')
  OPEN(UNIT=5,  FILE= '/dev/tty')
C