Likely the error message is "subscript is out of range". This message is a
"generic" one that indicates that the argument being supplied to a
subroutine or function is "out of the range" that the function or subroutine
expects or that it can find (e.g., suppose you have one form open, and your
programming tells ACCESS to open the second form in the collection --
because there is no second form, you'd get this error message).
You don't say how you're importing the file -- are you using File | Get
External Data | Import menu? Or are you using a macro (TransferSpreadsheet
action)? or VBA code (DoCmd.TransferSpreadsheet method)?