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174 Appendix B: General Information
NO SIGN CHNG
•The solve( function or the equation solver did
not detect a sign change.
• You attempted to compute æ when FV,
(Ú
…PMT), and PV are all ‚ 0, or when FV,
(Ú
…PMT), and PV are all _ 0.
• You attempted to compute
irr( when neither
CFList nor CFO is • 0, or when neither CFList
nor
CFO is • 0.
NONREAL ANS
In Real mode, the result of a calculation yielded a
complex result. This error is not returned during
graphing. The TI-84 Plus allows for undefined values
on a graph.
OVERFLOW
You attempted to enter, or you have calculated, a
number that is beyond the range of the graphing
handheld. This error is not returned during
graphing. The TI-84 Plus allows for undefined values
on a graph.
RESERVED
You attempted to use a system variable
inappropriately. See Appendix A.
SINGULAR MAT
• A singular matrix (determinant = 0) is not valid
as the argument for L1.
•The
SinReg instruction or a polynomial
regression generated a singular matrix
(determinant = 0) because it could not find a
solution, or a solution does not exist.
This error is not returned during graphing. The TI-84
Plus allows for undefined values on a graph.
SINGULARITY
expression in the solve( function or the equation
solver contains a singularity (a point at which the
function is not defined). Examine a graph of the
function. If the equation has a solution, change the
bounds or the initial guess or both.
Error Type Possible Causes and Suggested Remedies