Missing Python exception in Traceback

[fsimkovic]

The Python exception (+ message) is missing in the traceback.

2018-08-23 11:01:41,187 - root - DEBUG - AMPLE EXITING AT2...
  File "/home/felix/develop/ccp4-7.0/lib/python2.7/runpy.py", line 162, in _run_module_as_main 
    "__main__", fname, loader, pkg_name)
  File "/home/felix/develop/ccp4-7.0/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/home/felix/develop/ccp4-7.0/lib/py2/ample/__main__.py", line 18, in <module>
    main.Ample().main() 
  File "/home/felix/develop/ccp4-7.0/lib/py2/ample/main.py", line 102, in main
    self.ensembling(amopt.d)
  File "/home/felix/develop/ccp4-7.0/lib/py2/ample/main.py", line 214, in ensembling
    exit_util.exit_error(msg)
  File "/home/felix/develop/ccp4-7.0/lib/py2/ample/util/exit_util.py", line 83, in exit_error 
    traceback_str = "".join(traceback.format_stack())

[fsimkovic]

@linucks I think this is done. I certainly fixed a similar issue in SIMBAD, so maybe @hlasimpk can take a look