Code:

  PROGRAM hello
  PRINT *, "Hello from GFortran and Condor 7.4.2"
  END PROGRAM hello

Condor script:

  executable = hello
  universe   = vanilla

  requirements = (Memory > 900)

  ShouldTransferFiles   = IF_NEEDED
  WhenToTransferOutput  = ON_EXIT
      #
      # ...even though no output files other than STDOUT...

  output  = loop.$(Process).out
  error   = loop.$(Process).err
  log     = loop.log

  queue 10