"Index not Found" error!??

[MrDeveloper]

Hi,
I have started to come across the error message "Index not found" when accessing a form.

I have a main form which display a list of details about a person, and then a button that links to a pop-up form which gets related information to that person from a second table (i.e. a second table stores a list of different address details for that person on a 1-to-Many basis, which the pop-up form displays).

When you click on the button the pop-up form displays but immediately comes with this error. Click 'ok' on the error and the form closes, no activity can be completed.

A search has only showed info about this error in relation to importing database objects or accessing non-microsoft back-ends.

Has anyone else come across this problem and know of a solution?

Thanks,
MrD

 

[MrDeveloper]

Sorry - detail I forgot:
The application is multi-user (split front-end/back-end) for lots of people on a network. The majority don't get the error when accessing the form except 2 users - although they use Access 2002 and this is an Access 2000 application, but I don't believe this would cause the problem (other users might also be using Access 2002 - trying to clarify this).

Thanks in advance!
MrD.