Replacing PNG in script template with EXR?

[jldonovan3]

I'm needing to render out frames of an animation as multi-layer .exr files, and have the render output settings in my .blend file set as OpenEXR MultiLayer. If I change "PNG" to "EXR" in my brenda script template, would that be causing issues? I'm able to get a work queue going and spool up instances, but it seems like the instances aren't rendering frames. I'm not getting any errors, but I also get no output when I run brenda-tool ssh tail log (or any of the ssh commands). I did configure the cloud.cfg in my AMI to allow brenda-tool ssh tail log root access.

I'm trying to narrow down possibilities for why the instances aren't processing frames. If it's not the EXR, it might be an issue with my custom AMI, which is running Blender 2.79.