In Business Basic, if you open TWO random access files and then try to access some of the records, you get a SOS CALL ERROR 22. This error occurs, for example, in line 511 of the following sample program: Enter the record number 723 for A%, and anything for B%; enter anything for A$ and B$ on the first entry; enter the record number 723 for A%, and anything for B%; the system crashes with a "SOS CALL ERROR 22". 10 OPEN#6,".PROFILE/FILE1",15 20 OPEN#7,".PROFILE/FILE2",15 25 CATALOG".PROFILE" 30 INPUT "Enter A% ";A% 40 INPUT "Enter B% ";B% 50 ON EOF#6 GOTO 500 60 READ#6,A% 70 R=0:IF TYP(6)<>4 THEN GOTO 510 80 READ#6;A$ 90 IF R=0 THEN 520 95 INPUT "Enter A$ & B$";A$,B$ 100 WRITE#7,B%;A$ 110 WRITE#6,A%;B$ 120 GOTO 25 500 PRINT"Nothing in the file":OFF EOF#6:GOTO 70 510 PRINT"Nothing in the record":R=1 511 CLOSE#6 512 OPEN#6,".PROFILE/FILE1",15 513 GOTO 90 520 END If, however, you add the following lines, the program seems to continue to work normally: 5 ON ERR GOTO 1000 1000 PRINT"Error# "; ERR 1010 OFF ERR 1020 GOTO 512 Use this workaround to avoid any further problems.