Perhaps. But here, too, I would suspect runaway recursion. Perhaps a look at the call stack when the error ocurrs can help, showing which function is invoked by which other function (or by itself).
>The problem may be with the requery() method of the form or in the table triggers which fire on insert.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)