Lately whenever I try to create a trimmed project using Project Manager, I get a message that "Project Manager has encountered an unknown error." Do you have any idea as to the cause of this? Thanks.
Thank you, Eddie. That was a big help, although in an indirect way. The post you directed me to clued me in to the possibility that the problem might be PM's inability to handle a particular clip. I start most of my projects from a template and then save the project under a new name. Right around the time I started having problems using PM, I had added a new clip (an After Effects composition) to the template. So I tried deleting that, and voila! Thanks again.