Although once it occurs in the clip on the timeline if we send that clip from the bin to the monitor it occurs playing the clip back in the monitor (ie: there is no render in the source clips its fresh from the bin) - not the time line. That is the problem is in the rendered effect - not the source clip. If we remove the dissolves - no problem - clip sends to QT Ref perfectly. But it still occurs with the (is it) 8 bit codec.Ģ. Another work around is to use export and render the clip in MC as an MP4 (takes ages) and then you can re-code the clip in Sorensen or whatever (you will lose some quality this way).ġ. We mistakingly chose DNxHD 10 bit for the codec on the import - really, really worsened the problem.

When we get the error, we exit MC 5.5 (yes it occurs on the later versions) - reboot the computer and then we can re-enter MC and send the clip to QT reference. It occurs on dissolves and it is the same frame every time - deleting frames just moved the problem for us to the first frame after the cut - so we gave this up - also its not cool to remove frames in the middle of a dissolve - you get a different error - related to insufficient clip length for the dissolve, etc. It does not occur if we import the clips the old way with the import command and wait for them to import. Our error occurs on Canon 5D Mark ii files imported from AMA linked clips then consolidated to import the files as DNxHD codec. But we tried the project with the USB's detached and uninstalling old Avid FX (on same project it still re-occurred). I confess we have both USB drives attached (although make sure they are NOT referenced in the Media Creation/render settings) and we have an old version of Avid FX (unsupported and I am hoping to upgrade production suite soon). We still get it following all the advice in this forum and the Macintosh forum. Nothing conclusively resolved it for some of them and for us. One other poster also thought old unsupported versions of Avid FX plug ins were to blame. Over there (on the dark side - joking) they felt it was due to attached USB drives having some clips or renders on them.

There is quite a bit about it in the Media Composer Macintosh forum too.

Luca visual fx on avid