COLUMN /FILE

        [GREG1\]COLUMN /FILE File_Name

    Indicates in which formatted (list-directed free format) file  the  data
    are  to  be  read.  If  not given, the last input file or table is used.
    There is an implementation dependent limit (usually 50000) on the number
    of  lines that can be read by one COLUMN command in a formatted file. To
    go over that limit, you can  convert  the  formatted  file  to  a  table
    (recommanded, for efficiency), or work by pieces using /LINES.