Subj : Re: Rollback Functions To : comp.programming From : yaoziyuan Date : Wed Oct 12 2005 09:29 am And it's not to be confused with source code version control features seen in many IDEs which allow rolling back to a previous version of project source code. Anyway, "checkpoint and rollback recovery" has been a heavily researched area with the objective of recovering computer state from unwanted damage caused by released binary code and optionally generating runtime logs of such binary code for the product manufacturer to review their product in the original development environment. Yao Ziyuan .