Someone told me about a problem with an Access back end (only) ballooning in size with normal use, such as from perhaps 800 KB to about 300 MB. I'm familiar with this kind of problem occurring with a front end, such as possibly through certain VBA code activity (which is why I'm posting this here), but I'm not aware of why this would occur in a back end. The person who asked me about this says the back end has no code, only tables and two queries. I'm pretty sure it would be Acc XP on Win 2K, although it is possible that it began in a previous version of Access, such as 97 or earlier. Does anyone have any experience with this problem occurring for a back end only, or ideas about what would cause it? I recommended checking ‘Compact on close’ in general options, but am wondering about how effective this would be. Thanks.