Texas Instruments TI-84

Appendix B: Reference Information 655

VARIABLE You have tried to archive a variable that cannot be

archived or you have tried to unarchive an application

or group.

Examples of variables that cannot be archived include:

• Real numbers LRESID, R, T, X, Y, Theta, Statistic

variables under Vars, STATISTICS menu, Yvars,

and the AppIdList.

VERSION You have attempted to receive an incompatible variable

version from another graphing calculator.

WINDOW

RANGE A problem exists with the window variables.

• You defined XmaxXmin or Ymax Ymin.

• You defined qmaxqmin and qstep>0 (or vice

versa).

• You attempted to define Tstep=0 .

• You defined TmaxTmin and Tst ep >0 (or vice

versa).

• Window variables are too small or too large to graph

correctly. You may have attempted to zoom in or zoom

out to a point that exceeds the TI-84 Plus’s numerical

range.

ZOOM • A point or a line, instead of a box, is defined in ZBox.

•A ZOOM operation returned a math error.

Error Type Possible Causes and Suggested Remedies