Thank you for the response. I think I have determined that my project is corrupted. Every clip on the sequence, save for the very last clip, can be rendered. The sequence has about 26 min. of video. The last clip is about 15 seconds long and will play (preview quality) but generates the error if I try to render it.
I took some new clips and added them to the sequence after that last clip, and discovered the error occurs with them too. It’s like there is a dividing line in my timeline before which is fine and after which produces the “General Error.”
I still do not know the cause of the error. I have scanned every drive to check for disk, directory, or partition errors (because another topic had info posted about this possibility), but the drives all appear clean.
Suffice it to say, I am scrapping the project and going back to a previously saved version.