opened
bd4
username_0
Code expects all return codes to be numeric, but they can still be None.

```
Traceback (most recent call last):
  File "/projects/CSC249ADCD01/cluster2018sw/cheetah/cheetah.py", line 131, in <module>
    main()
  File "/projects/CSC249ADCD01/cluster2018sw/cheetah/cheetah.py", line 37, in main
    status_command(prog, command_args)
  File "/projects/CSC249ADCD01/cluster2018sw/cheetah/cheetah.py", line 127, in status_command
    print_output=args.print_code_output)
  File "/lus/theta-fs0/projects/CSC249ADCD01/cluster2018sw/cheetah/codar/cheetah/status.py", line 68, in print_campaign_status
    filter_run=filter_run)
  File "/lus/theta-fs0/projects/CSC249ADCD01/cluster2018sw/cheetah/codar/cheetah/status.py", line 207, in get_workflow_status
    % (prefix * 2, code_name, rc[code_name]))
TypeError: %d format: a number is required, not NoneType
```
status -c fails when return codes are None
issue
closed
bd4
username_0
issue