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Appendix — Reference Information 95
Accuracy Information
The calculator stores results internally as 13-digit numbers but displays
them rounded to 10 digits or fewer, depending on the decimal format.
The internal digits, or guard digits, increase the calculator’s accuracy.
Additional calculations use the internal value, not the value displayed.
Error 5
No solution
exists
• TVM worksheet: the calculator computed
I/Y when
FV, (N Q PMT), and PV all have the same sign.
(Make sure cash inflows are positive and outflows
are negative.)
• TVM, Cash Flow, and Bond worksheets: the LN
(logarithm) input is not > 0 during calculations.
• Cash Flow worksheet: the calculator computed
IRR
without at least one sign change in the cash-flow
list.
Error 6
Invalid date
• Bond and Date worksheets: a date is invalid (for
example, January 32) or in the wrong format (for
example, MM.DDYYYY instead of MM.DDYY.
• Bond worksheet: the calculator attempted a
calculation with a redemption date earlier than or
the same as the settlement date.
Error 7
Iteration limit
exceeded
• TVM worksheet: the calculator computed
I/Y for a
very complex problem involving many iterations.
• Cash Flow worksheet: the calculator computed IRR
for a complex problem with multiple sign changes.
• Bond worksheet: the calculator computed YLD for
a very complex problem.
Error 8
Canceled
iterative
calculation
• TVM worksheet: $ was pressed to stop the
evaluation of
I/Y.
• Amortization worksheet: $ was pressed to
stop the evaluation of BAL or INT.
• Cash Flow worksheet: $ was pressed to stop
the evaluation of
IRR.
• Bond worksheet: $ was pressed to stop the
evaluation of YLD.
• Depreciation worksheet: $ was pressed to stop
the evaluation of DEP or RDV.
Error Possible Causes