bwBASIC: AUTO
10 OPEN "R", #1, "JUNK.DAT", 64
20 FIELD#1, 64 AS C_NAME$
30 LSET C_NAME$ = "JON WAS HERE AND THEN HE LEFT"
40 ?C_NAME$
50 LSET C_NAME$ = "JOE"
60 ?C_NAME$
^C
bwBASIC: RUN
JON WAS HERE AND THEN HE LEFT                                   
JOE WAS HERE AND THEN HE LEFT                                   

If I write a long string into a `FIELD` var and then write a short string the longer part of the previous string remains. ``` bwBASIC: AUTO 10 OPEN "R", #1, "JUNK.DAT", 64 20 FIELD#1, 64 AS C_NAME$ 30 LSET C_NAME$ = "JON WAS HERE AND THEN HE LEFT" 40 ?C_NAME$ 50 LSET C_NAME$ = "JOE" 60 ?C_NAME$ ^C bwBASIC: RUN JON WAS HERE AND THEN HE LEFT JOE WAS HERE AND THEN HE LEFT ``` The purpose of `LSET` and `RSET` are to left or right justify content into a `FIELD` variable, padding the remaining space with " ". It hasn't been tested but `RSET` is likely broken too. :-(