This is a problem I have never encountered before. I am editing a TV series and have created a set of standard title cards and supers to use for each episode. As it slows my machine down too much to use Dynamic Link, I have simply exported the compositions as Quicktimes and imported them into my Premiere project.
Now, my issue is, repeatedly, I have had the media for these go offline when I have closed and reopened the project. Premiere doesn't warn me like it normally does for offline media, it just puts the red graphic throughout my sequence. When I go to relink, I am informed that there is a mismatch, and if I hit OK, the graphic is replaced with a silent audio track. The actual Quicktime file is unchanged.
I have tried a few things, including rewrapping with both Media Encoder and Mpeg Streamclip and changing the file extension or opening up the Quicktimes in a new project to no avail. My only solution is to re export the Quicktimes, but they break again (they work initially) and sometimes some will break and others won't, it's a mess.
Anyone else encountered this? It's bizaare, and rexporting these files in animation codec each time is taking up a lot of space on my computer.