Texas Instruments TI-89 User Manual

Appendix B: Technical Reference

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Appendix B: Technical Reference

This section contains a comprehensive list of TI-89 Titanium / Voyage™ 200 error
messages and character codes. It also includes information about how certain TI-89
Titanium / Voyage™ 200 operations are calculated.

TI-89 Titanium / Voyage™ 200 Error Messages

This section lists error messages that may be displayed when input or internal errors are
encountered. The number to the left of each error message represents an internal error
number that is not displayed. If the error occurs inside a Try...EndTry block, the error
number is stored in system variable errornum. Many of the error messages are self-
explanatory and do not require descriptive information. However, additional information
has been added for some error messages.

Error

Number Description

A function did not return a value

A test did not resolve to TRUE or FALSE

Generally, undefined variables cannot be compared. For example,
the test If a<b will cause this error if either a or b is undefined when
the If statement is executed.

Argument cannot be a folder name

Argument error

Argument mismatch

Two or more arguments must be of the same type. For example,

PtOn

expression1,expression2

and

PtOn

list1,list2

are both valid,

but

PtOn

expression,list

is a mismatch.

Argument must be a Boolean expression or integer

Argument must be a decimal number

Argument must be a label name

Argument must be a list

100

Argument must be a matrix

110

Argument must be a Pic

120

Argument must be a Pic or string

130

Argument must be a string

140

Argument must be a variable name

For example, DelVar 12 is invalid because a number cannot be a
variable name.

150

Argument must be an empty folder name

160

Argument must be an expression

For example, zeros(2x+3=0,x) is invalid because the first argument is
an equation.

161

ASAP or Exec string too long