>Dear Nick,
>
>In my case, the project run on a PC only.
>The tables are opened unexclusively.
>In my main form, I utilize a local view on a grid to maintain the detail transaction of a stock item. Does it make the trouble?

No, I do this all the time.

>The error message generated is 'Tables cannot be accessed' which with a 'OK' button and 'Help' button. After I click the 'OK' button, The program continue to run without further problems.
>
>What do you guess?
>
>Regard
>Ransome

Did you try to trace it and see what's happening - i.e. what line causes trouble, what is open at the moment, which area is selected at that point?