At run time, DIVIDE statements that do not include an ON SIZE ERROR phrase and that produce a division by zero error are handled differently by HP COBOL and ACUCOBOL-GT. Programs compiled with HP COBOL output an error message and terminate. The behavior of programs compiled with ACUCOBOL-GT is undefined. In some cases the program does not terminate. It is strongly recommended that you always use the ON SIZE ERROR phrase with any arithmetic statement that could generate a size error.