Texas Instruments TI86 User Manual - Page 177

All elements of a list referenced by an attached formula must be valid for the attached formula. Chapter 11: Lists 165 You can successfully attach to a list a formula that does not yet resolve to a list. For example, you can attach "5¹xStat" to the list name BY5 with no elements stored to xStat. However, if you attempt to display BY5 when xStat has no elements, an error occurs. When you attach such a formula to a list name in the list editor, the formula is successfully attached, but an error occurs. This is because the list editor attempts to execute the formula immediately after attaching it to the list name. To view the list editor again, you must return to the home screen and either enter something to cause the formula to resolve to a list or remove the attached-formula list from the list editor using the LIST OPS menu item SetLE (page 161). Handling Errors Related to Attached Formulas On the home screen, you can attach to a list a formula that references another list that has no elements (dimension is 0; page 161). However, you cannot display the attached-formula list in the list editor or on the home screen until you enter at least one element to the list that the formula references. Tip: If an error menu is returned when you attempt to display an attached-formula list in the list editor, you can select GOTO, write down the formula that is attached to the list name, and then press : b to detach (clear) the formula. Then you can use the list editor to find the source of the error. After making the appropriate changes, you can reattach the formula to the list name. If you do not want to clear the formula, you can select QUIT, display the referenced list on the home screen, and find and edit the source of the error. To edit an element of a list on the home screen, store the new value to listName(element#) (page 155).