I have tab delimited text file with some 155 columns. When I try to import it
into an existing table using the import wizard it gives me an 'Invalid
Argument' error. But when I do the same import after converting the text file
to an excel file , it works fine. I tried to import, after the changing the
data in the text file to be of the same datatype as that in the table
specification. But even now it gives the same error but works in excel.

Any idea why this error occurs and how to avoid it?