Hi, I found that the maximum size of a .mb file is 64k. You can't open a .mb file in the Mapbasic program over this size (my experiences). So this is my first project file(MBP)'s utility. Second: << The advantage of using project files(MBP) center around the aforementioned reusability of code: When you write code in this manner, the project file acts as a program bank containing open slots into which you may insert various program modules........the program is now modular and if another developer must alter the way the program displays map results, she or he does not need to search througt 10000 lines of code....and note that: Recompiling a single module and then relinking its project file require less time than compiling a single .MB file containing all the subroutines and functions used by the program.>> >From MapBasic Developer's Guide Whitener, Ryker, Onword Press, p.64-65 Hope this Helps François Bergeron, Conseiller en Géomatique Ministère des Transports du Québec Direction des technologies de l'information Service à la clientèle (Soutien Géomatique) Téléphone: (514) 873-4293 E-Mail: [EMAIL PROTECTED] ou [EMAIL PROTECTED] ---------------------------------------------------------------------- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]