Texas Instruments TI89TITANIUM User Manual - Page 914
Appendix A: Functions and Instructions, TI-89 Titanium / Voyage™ 200 Error Messages
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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 selfexplanatory and do not require descriptive information. However, additional information has been added for some error messages. Error Number Description 10 A function did not return a value 20 A test did not resolve to TRUE or FALSE Generally, undefined variables cannot be compared. For example, the test If a