I'm sorry I did not yet post a file for testing.
The file this occurs in is very large to post on the web. I've been trying to narrow it down, but so far it's remained mysterious - I've encountered it a few more times, but can't figure out what causes it or when to excpect it.
It happens rarely but sometimes (and when it does, it's obviously quite frustrating since it won't print) when printing 2-up or booklet imposed.
It doesn't happen if printing the same file 1-up.
I can narrow down the pages that cause it by where the error occurs. However, if I copy those 8.5 x 11 pages one at a time into a new 11 x 17 document and print that (instead of having corel impose the two pages 2-up) I also do not get the error.
Finally, I thought I woudl be able to post a small file here by deleting all content on the pages that don't cause the error leaving only the two offending pages 100% as they were in the original document, but after doing this, found that no error occurred then either.
So it's quite a mystery for me. I'm still trying to narrow it down or have it occur on a nice very small file to post here.
As a workaround:
* I can use corel's publish to pdf to generate a pdf, and then use cutepdf pro to bookletize to print the proof
* I can copy and paste the offending pages onto a new 11 x 17 sheet to manually 2-up impose those myself to print without error.