if file('autoinc_test.dbf')
 drop table autoinc_test
endif

if not file('autoinc_test.dbf')
   create table autoinc_test  (id autoinc)
   use autoinc_test
   for n = 1 to 5
       append blank
    next   
   use
endif
clear
f = new file()
f.open('autoinc_test.dbf','RW')
f.seek(110)
f.write(chr(0xFE)) //2 before transition from positive to negative
f.write(chr(0xFF))
f.write(chr(0xFF))
f.write(chr(0x7F))
f.close()
use autoinc_test
   for n = 1 to 5
       append blank
    next   
   use
f.open('autoinc_test.dbf','RW')
f.seek(110)
f.write(chr(0xFE)) //2 before transition from negative to positive
f.write(chr(0xFF))
f.write(chr(0xFF))
f.write(chr(0xFF))
f.close()
use autoinc_test
   for n = 1 to 5
       append blank
    next  
list id,itoh(id) all
use