Our exported DNxHR QuickTimes do not import in MediaComposer

Hi,

Our exported DNxHR QuickTimes give the following error in MC (8.5.3):"A video compression id of 0 with an edit rate of 1/1 and a height of 1080 was not found in the AAFInfo.xml" and show black frames. Our DNxHD QuickTimes work fine. We use DNx SDK 2.2.2. I tried 2.2.3 and get the same

Is there something required in the file header that was not needed for DNxHD?  I can send a sample if needed.

Thanks,

Eric