Barry,

Do you have a cbo set to fields and specified the table alias on more than one field? The alias can only appear on the first field in the RowSource.

> It's obviously something to do with this particular form, however, I can't stop it at the point of the error.
> If I press the IGNORE command button in the error message dialog box, the error message disappears and the form and all the contained objects within it function properly. Has anybody else experienced this problem? I'm using Vis Fox 6.0.