Texas Instruments TI-89 User Manual - Page 916

Error Number Description 280 Else and ElseIf invalid outside of If..EndIf block 290 EndTry is missing the matching Else statement 295 Excessive iteration 300 Expected 2 or 3-element list or matrix 307 Flash application extension (function or program) not found 308 Flash application not found 310 First argument of nSolve must be a univariate equation The first argument must be an equation, and the equation cannot contain a non-valued variable other than the variable of interest. For example, nSolve(3x^2- 4=0, x) is a valid equation; however, nSolve(3x^2- 4, x) is not an equation, and nSolve(3x^2- y=0,x) is not a univariate equation because y has no value in this example. 320 First argument of solve or cSolve must be an equation or inequality For example, solve(3x^2- 4, x) is invalid because the first argument is not an equation. 330 Folder An attempt was made in the VAR-LINK menu to store a variable in a folder that does not exist. 335 Graph functions y1(x)...y99(x) not available in Diff Equations mode 345 Inconsistent units 350 Index out of range 360 Indirection string is not a valid variable name 380 Invalid ans() 390 Invalid assignment 400 Invalid assignment value 405 Invalid axes 410 Invalid command 420 Invalid folder name 430 Invalid for the current mode settings 440 Invalid implied multiply For example, x(x+1) is invalid; whereas, x∗(x+1) is the correct syntax. This is 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 Lower Bound cannot contain any commands or a colon (:). See also "Creating and Evaluating User-Defined Functions" in the Calculator Home Screen module. Appendix B: Technical Reference 917