Details

This message is generated when an InterpolatingFunction expression is integrated, and the range of integration extends outside the range of the interpolation.
Although this message does not necessarily represent an error, extrapolation beyond the range of interpolation can give unexpected or misleading results.
Off[message] switches off the message; On[message] switches it on. For example: Off[InterpolatingFunction::dmvali].

Examples

A warning message is generated because computation of the integral requires extrapolation beyond the range of interpolation of the integrand:

Wolfram Language code: interp = FunctionInterpolation[Sin[x], {x, 0, Pi}]

Wolfram Language code: Integrate[interp[x], {x, 0, 2Pi}]

A more accurate result can be computed by extending the range of interpolation:

Wolfram Language code: interp = FunctionInterpolation[Sin[x], {x, 0, 2 Pi}]

Wolfram Language code: Integrate[interp[x], {x, 0, 2Pi}]

Clear the value of interp:

Wolfram Language code: Clear[interp]

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