Texas Instruments TI-89 Titanium User Manual page 437

If the equation is:
2nd-order
(system of two 1st-order equations)
3rd- or higher-order
(system of three or more 1st-order equations)
Because
Fields = SLPFLD
setting, a common error message is shown to
the right.
When you see this or any other error message:
• For your order of equation, use the previous table to find the valid Fields settings.
Change to the applicable setting.
• For a particular Fields setting, check the following for information that applies to that
setting.
Differential Equation Graphing
Valid Fields settings are:
DIRFLD or FLDOFF
FLDOFF
is the default
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