I am having the an issue when I try to render a Quicktime ProRes 422 master. I can encode it without problems within Premiere, but when I send it to AME I get the Export Error message, with error code 2147287036 listed. I am on a brand new 27 iMac Retina 5K, 4.2 Ghz processor, 64GM RAM, and a Radeon Pro 580 with 6 GB VRAM. This is a fresh install of Creative Cloud. There are no previous versions running on this system, as I installed Creative Cloud apps for the first time on Thursday. I am running 12.1.2 on both Premiere and Media Encoder.

To be clear, I only encounter the issue when rendering a ProRes file from AME. I can render the same sequence as a H.264 for example, within AME. Or I can render a ProRes file of the sequence within Premiere. But not ProRes within AME.

Please advise.