Texas Instruments TI-89 Manual Book page 565

Error
Number Description
850 Program not found
A program reference inside another program could not be found in the
provided path during execution.
860 Recursion is limited to 255 calls deep
870 Reserved name or system variable
875 ROM-resident routine not available
880 Sequence setup
885 Signature error
890 Singular matrix
895 Slope fields need one selected function and are used for 1st-order equations only
900 Stat
910 Syntax
The structure of the entry is incorrect. For example,
is invalid; whereas,
930 Too few arguments
The expression or equation is missing one or more arguments. For
example, d
940 Too many arguments
The expression or equation contains an excessive number of arguments
and cannot be evaluated.
950 Too many subscripts
955 Too many undefined variables
960 Undefined variable
965 Unlicensed product software or Flash application
970 Variable in use so references or changes are not allowed
980 Variable is locked, protected, or archived
990 Variable name is limited to 8 characters
1000 Window variables domain
1010 Zoom
548 Appendix B: Reference Information
( plus negative
x+ë y x
is invalid; whereas, d(
(f(x))
(
x+ì y x
) is correct.
y
is the correct syntax.
f(x),x)
plus minus )
y