Here's an update:
I followed David's suggestion and made some minor edits in Sigil. Then I switched back to the Calibre editor, but the problem persisted. However, being obstinate by nature, I turned the preview pane off and continued editing blindly. After a number of changes I saved the file and then took a peek at the preview and voila. The error message is gone. Thanks for your help David.
And to those of you who read my post and thought "Gee I hope he doesn't have to redo all that work." Thanks for your sentiments.
|