'Expr' is a field name. When you browse a table (rectrav.frx in this case) you may certainly see field names.

>Hi Sir,
>
>I have opened my rectrav.frx and how can I tell that it is printer-related data or not? I don't have a blank fields. What is 'Expr' field? How can I tell that it is 'Expr' field?
>
>Please help.
>
>Thanks,
>Sam
>
>>You should remove printer-related data from frx file: open it from command window, go >to the 1st record, blank fields 'Tag', 'Tag2', and remove printer-related data from >field 'Expr'.