The SLN (Start Line Number) keyword determines where a record format is written to a display file. The main file description line must contain WORKSTN in positions 36 through 42 and a C or O in positions 17. The DDS for the file must specify the keyword SLNO(*VAR) for one or more record formats. When you specify the SLN keyword, the parameter will automatically be defined in the program as a numeric field with length of 2 and with 0 decimal positions.
Do not use the SLN keyword with the SFILE keyword.