Error Messages - HP Business Consultant 20b Manual

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HP 20b Operating modes and clearing options
will be deleted, with each successive press deleting another digit. Note: This will delete the least significant digit of the
number, which may not be the least significant digit displayed due to the chosen display setting.
TIP: This is perhaps the easiest way to see all the digits of a number, regardless of the chosen display format. Simply
press { after a calculation to see all the digits. Pressing O one time will exit this edit mode without clearing the
number in the display.
To enter a number in the display, press the digits successively. A number can have up to 12 digits. To change the sign
of a number from positive to negative, press }. Scientific notation is used to enter very large and very small numbers.
For example, to enter the number 1.2345
and enter the number representing the exponent, 123. The exponent must have a value between -499 and +499.

Error messages

The table that follows shows the error messages that the HP 20b can produce and their meanings.
Error Message
ER: Underflow
ER: x/0
ER: 0/0
ER:∞*0
ER: ∞/∞
ER:√ (x<0)
ER: LN (0)
ER: LN (x<0)
ER: ATrig(|x|>1)
ER: 1^ ∞
ER: (x<0)^ ∞
ER: ∞^0
ER: ∞^(Frac)
ER: (x<0)^(Frac)
ER: Out of Bounds
ER: Invalid P/YR
ER: Invalid Input
ER: Invalid I%
ER: No Solution
ER: Many or No Solutions
ER: Many Solutions
ER: Invalid N
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in scientific notation, first enter the mantissa, 1.2345, then press: :w
123
Cause or explanation
The calculation generated an underflow (result of 0).
Division by zero.
Zero divided by zero
Infinity multiplied by zero.
Infinity divided by infinity.
Square root of a negative number.
Attempted to take the natural log (LN) of 0.
Attempted to take the natural log (LN) of a negative number.
ASIN or ACOS of a number > 1.
Attempted calculation of 1^(+/- infinity)
Attempted calculation of the infinite power of a negative number.
Attempted calculation of +/-∞^0.
Attempted calculation of +/-∞^(non-integer y).
Attempted calculation of x^(non-integer y).
Input out of bounds.
Returned by TVM functions if payments per year are invalid (<0 or non-integer).
Returned by any functions if arguments are invalid for any reason.
Returned by finance functions if I% is ≤ -100%.
Returned when there is no solution to the problem.
Returned if there is no solution, or more than 1 solution to the problem.
Returned when there are many solutions to the problem.
Returned by time value of money or amortization functions if the number of periods per
year definition is invalid.
- 4 - HP 20b Operating modes and clearing options - Version 1.0