EXR does not appear in the list of available output file types - looking under the common tab in render settings. Here's what's in the file format drop-down menu:
(the blank one seems to be a duplicate of GIF)
Is there something I need to do to enable the EXR format?
Maya 2017
Octane Plugin v3.05.3 - 9.41
Windows 10Pro v1607
Thanks!