A single InDesign document can contain up to 9,999 pages, but page numbers can be as large as 999,999. (For example, you can correctly number a 100‑page document that starts on page 9,949.) By default, the first page is a recto (right) page numbered 1. Odd-numbered pages always appear on the right; if you use the Section Options command to change the first page number to an even number, the first page becomes a verso (left) page.
Hi Enas, it sounds like the issue you are experiencing is about the PDF Export process. Have a look at this thread on the Adobe Community support forum:http://forums.adobe.com/thread/615575 It seems to suggest that corrupt image files can cause problems like this. You also might want to check that you enough space on the disk you’re exporting the PDF too – if it runs out of room then you would get errors. Sorry I can’t help much more than give you some general ideas. Best of luck resolving the issue. Cheers Philippa

Michelle Castle began writing professionally in 2005. She has written technology news and tutorials for consumers, brochure and web copy for the Ehlers-Danlos National Foundation, and promotional materials for religious nonprofits including the International Pentecostal Holiness Church. Michelle has a Bachelor of Arts in English from Oklahoma State University. numbering in word