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NDSolve::stpmax NDSolveValue::stpmax ParametricNDSolve::stpmax ParametricNDSolveValue::stpmax

NDSolve::stpmax NDSolveValue::stpmax ParametricNDSolve::stpmax ParametricNDSolveValue::stpmax

Details

  • This message is generated when the indicated options impose incompatible restrictions on the number of steps.
  • Off[message] switches off the message; On[message] switches it on. For example: Off[NDSolve::stpmax].

Examples

Basic Examples  (1)

A warning message is generated because there is no choice for the number of steps that will satisfy all of the indicated options:

Wolfram Language code: NDSolve[{D[u[x, t], t] == D[u[x, t], x, x], u[x, 0] == Exp[-100 x ^ 2], u[-1, t] == u[1, t]}, u, {x, -1, 1}, {t, 2}, Method -> {"MethodOfLines", "SpatialDiscretization" -> {"TensorProductGrid", MaxPoints -> 1000, "StartingPoints" -> 1200}}]

This shows a correct input:

Wolfram Language code: NDSolve[{D[u[x, t], t] == D[u[x, t], x, x], u[x, 0] == Exp[-100 x ^ 2], u[-1, t] == u[1, t]}, u, {x, -1, 1}, {t, 2}, Method -> {"MethodOfLines", "SpatialDiscretization" -> {"TensorProductGrid", MaxPoints -> 1200, "StartingPoints" -> 1000}}]