Cannot get IOUnit object count

In PAC Display we keep running into this error:
"Cannot get IOUnit object count from strategy file"
Not sure what we’re doing to cause this, and I couldn’t find anything in the docs.
Any ideas?

Just a shot in dark, in pac display check “configure\Runtime Setup\IO Unit Tags”. Otherwise might be a sw issue, which version 9.6g? If not, try sw update.
Is you’re PD on same subnet as brains?
I typically use the controller to get the counts and then use PD to access.