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)?