CorelDRAW can do so many things that I often find users wanting to create really long documents such as magazines and books with it. I don’t feel it is the best tool for the job, but I certainly can’t convince users of this.
If you are going to create that type of documents, break it into multiple files with no file having more than 10-12 pages. Should something go wrong, you will only have to re-create those pages and not the entire document. When you have all the pieces done, you can import each of them into a single document with all pages.
While it still isn’t the ideal tool for these jobs, you’ll have a much better experience if you break up the file into this much smaller pieces.