Black Screen

Working in AE CC 2015.3.

When I try to track a DNxHD 145 file,

all I am seeing is a black screen in Mocha AE.

Is this a compatibility issue? Tried relinking

and still no go.

This sounds like it’s possibly a codec issue. Do you have the DNxHD codec installed for QuickTime?
If you’re still experiencing problems you may need to transcode to a different codec or use an image sequence.