LabVIEW Linux RT PXIE-8881 SMB Trigger Not working

[7Ronin]

I'm attempting to get some Analog Input tasks triggered from the PXIE-8881 Controller using the SMB Trigger but I get error -81930 at the DAQmx Start VI:

Error -89130 occurred at PT-6296 RT Main Single AI Task.vi

Possible reason(s):

Device not available for routing. It is possible that the device needs to be reset or that the device is being reset.

This seems like it should be pretty simple- What am I missing?