James, I'm so glad I stumbled across this thread. Very frustrated over here. FCP user, so trying to get up to speed with Resolve while trying to understand what I need to do to not get that error has been maddening. And RODE zero help.
Shot Sony A1 422 8k video using the Wireless Pro and both transmitters. RX set to 29.97 (not 29.97 frame drop).
Attempt 1: Created new project in Resolve. In Edit mode, imported the two video clips I took plus the 4 audio files (1 file from each transmitter for each video). Clicked on the two video files, then did the "update the time code from audio track" step. Then I selected all files (2 video files plus the 4 audio files) and did the "Auto Align with Time Code" step. Then I dragged the each of the video files into the timeline, and sure enough, the audio tracks seem to be in alignment with their respective video, as they should be. Then I go to Project Setting, set the data to FULL, and try to export the Timeline. I then go to FCP, into a library that has the same exact files in it, and the import give your message as well as a message about the color space being different.
So I have two problems: The invalid edit issue, plus the color space issue. As for the color space issue, not sure why Resolve is creating a timeline with Rec709 when the files themselves are 422 10bit PQ and I have the export settings set to 2020 PQ. Perhaps I have done something wrong here.
As for the invalid edit issue, I've tried the compressor path you went (which creates massive files, by the way) - set the two timecode settings to 00000 and exported them into my FCP library, and then re did the whole Resolve project and no luck.
I also tried changing the timecode on the two files within Resolve itself (Clip Attributes - change the two time settings to 0000). Once I've done that, I'm not sure what the workflow should look like. Do I now bypass the first Resolve workflow step of "update timecode from audio track" ? What exactly should the steps be?