During the build process, when you get the error, what object is currently being processed. The status bar should give a clue here...

>>>."Variable is not found" with an OK and Help screen.
>>
>>Do you have an index that includes a variable, or some other non-table element in the expression?
>
>No John,
>
>Its just a field called
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>MessageHandlerId
>
>and an Index expression of
>
>MessageHandlerId
>
>with a tag name of
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>MsgHandId
>
>We are getting closer to Beta so we have just included the framework tables into the exe to prevent them from being changed - hence we have just found these problems!!