FunctionInterpolation::ncvb

Details

This message is generated when FunctionInterpolation is unable to compute a suitable interpolation using the indicated number of recursive refinements of the interval.
This message is most often seen for functions that have a sharp feature or that have features that are difficult to approximate.
This error can usually be corrected by increasing the value of the MaxRecursion option, decreasing the AccuracyGoal or PrecisionGoal options, or through qualitative changes in the input, such as breaking the interpolation up into smooth segments.
Off[message] switches off the message; On[message] switches it on. For example: Off[FunctionInterpolation::ncvb].

There are difficulties approximating the sharp feature in the function in the first argument:

Avoid this error by reducing the value of the AccuracyGoal option:

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