vba access code entering break mode

I have been running an application developed using VBA and Access 2000 for some time. It has a lot of querries, reports, forms etc. and it is scheduled to run early in the morning. From yesterday, probably half way through the execution it enters the break mode on its own. I know there hasn't been any code change and I regularly Compress and Repair the data as well. The size of the DB is now 806 MB. Any help on this will greatly appreciated.Thanks

[613 byte] By [skbNo5] at [2007-12-28]