HP HP-20S - Page 125

Error - StAt (Error - Statistics).
B Attempt to calculate X,,, X, j, or r with x-data only (all y-values
equal to zero).
B Attempt to calculate X, §, r, m, or b with all x-values equal.
B Attempt to calculate with n equal to zero.
B Attempt to calculate S, S, X, §, r, m, or b, with n < 1, or when a
division by zero or square root of a negative number occurred.
Also, attempt to calculate X, y with n = 0, or X, with Zy = 0.
Error - Sub (Error - Subroutine). Subroutines nested more than four lev-
els deep (page 80).
Fit (Curve Fitting). Built-in program (page 105).
int (Numerical Integration). Built-in program (page 91).
OFLO (Overflow). The magnitude of a result is too large for the calculator
to handle. OFLO is displayed for a moment (or remains in the display
when OFLO occurs in a running program), then the HP-20S returns
£9.99999999999E499 in the current display format. If OFLO is caused by
storage register arithmetic, the display value remains unchanged. If OFLO
is caused by Z+, n appears in the display. (Refer to “Range of Numbers”
on page 20).
root (Root Finder). Built-in program (page 89).
running (Running). A program or a long calculation is running.
too big (Too Big). The magnitude of the number is too large to be con-
verted to hexadecimal, octal, or binary base. The number must be in the
range —34,359,738,368 < n < 34,359,738,367 (page 48).
qUAd (Quadratic Equation). Built-in program (page 102).
3 bY 3 (3 X 3 Matrix Operations). Built-in program (page 97).
20 - FAIL n (HP-20S Fail). The self-test failed; n is the fail code
(page 116).
20 - Good (HP-20S Good). The self-test is complete (page 116).
Messages 123