Texas Instruments TI-89 Manual Book page 562

Error
Number Description
405 Invalid axes
410 Invalid command
420 Invalid folder name
430 Invalid for the current mode settings
440 Invalid implied multiply
For example,
to avoid confusion between implied multiplication and function calls.
450 Invalid in a function or current expression
Only certain commands are valid in a user-defined function. Entries that are
made in the Window Editor, Table Editor, Data/Matrix Editor, and Solver as
well as system prompts such as
or a colon (:). See also "Creating and Evaluating User-Defined Functions" in
Chapter 5.
460 Invalid in Custom..EndCustm block
470 Invalid in Dialog..EndDlog block
480 Invalid in Toolbar..EndTBar block
490 Invalid in Try..EndTry block
500 Invalid label
Label names must follow the same rules used for naming variables.
510 Invalid list or matrix
For example, a list inside a list such as
520 Invalid outside Custom..EndCustm or ToolBar..EndTbar blocks
For example, an
structure.
530 Invalid outside Dialog..EndDlog, Custom..EndCustm, or ToolBar..EndTBar blocks
For example, a
ToolBar
540 Invalid outside Dialog..EndDlog block
For example, the
structure.
550 Invalid outside function or program
A number of commands are not valid outside a program or a function. For
example,
is invalid; whereas,
x(x+1)
command is attempted outside a
Item
Title command is attempted outside a
structure.
DropDown command is attempted outside a
Local cannot be used unless it is in a program or function.
is the correct syntax. This is
xù (x+1)
cannot contain any commands
Lower Bound
is not valid.
{2,{3,4}}
Dialog
Appendix B: Reference Information
or
Custom ToolBar
, Custom , or
Dialog
545