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NDSolve::nerres NDSolveValue::nerres ParametricNDSolve::nerres ParametricNDSolveValue::nerres

NDSolve::nerres NDSolveValue::nerres ParametricNDSolve::nerres ParametricNDSolveValue::nerres

Details

  • This message is generated by numerical failure in solving a partial differential equation.
  • Off[message] switches off the message; On[message] switches it on. For example: Off[NDSolve::nerres].

Examples

Basic Examples  (1)

A warning is generated because the specified value of the MaxSteps option may not be sufficient to compute a solution within the default tolerances:

Wolfram Language code: NDSolve[{Derivative[2, 0][f][x, t] == Derivative[0, 2][f][x, t], f[0, t] == 0, f[1, t] == 0, Derivative[0, 1][f][x, 0] == 0, f[x, 0] == Sin[2 Pi x]}, f, {x, 0, 1}, {t, 0, 1}, MaxSteps -> {10, Automatic}]

A solution is computed without difficulty if a larger value is used for the MaxSteps option:

Wolfram Language code: NDSolve[{Derivative[2, 0][f][x, t] == Derivative[0, 2][f][x, t], f[0, t] == 0, f[1, t] == 0, Derivative[0, 1][f][x, 0] == 0, f[x, 0] == Sin[2 Pi x]}, f, {x, 0, 1}, {t, 0, 1}, MaxSteps -> {100, Automatic}]