Number of Columns you can ASCII import into a WorksheetThere is a know limitation of the File: Import ASCII routine.
Only 254 columns can be imported directly into the worksheet.
There is a workaround. Create a new matrix: File: New Matrix.
While the matrix is the active window select File: Import ASCII.
This will import up to 425 columns into the matrix. Next select
Edit: Convert to Worksheet: Direct. This will move the data from
the matrix window to a new worksheet with all of your data.