Quote:
Originally Posted by Warren_Harding
It says that it fails to generate a preview, then the Regex Builder window shows up, but its empty. Yes, the book is ~935 pages, but since I don't see a progress bar or anything I have no idea whether it's still loading something or not.
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Quote:
Originally Posted by eschwartz
Well, I have no idea why it should show an error message.
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It there is no text in the document then it will generate an empty preview. I don't have the code in front of me at the moment, but I wouldn't be surprised if a book with no text produces some error message.
BTW: some PDFs are a combination of images and underlying text. The image is the "main" document and the text is used when selecting. The text is often generated by OCR and equally often has a very weak relationship with the text shown in the image. I don't remember if in this situation, calibre will try to grab the underlying text.