WOLFRAM

Wolfram Language & System Documentation Center
NDSolve::ntdvdae NDSolveValue::ntdvdae ParametricNDSolve::ntdvdae ParametricNDSolveValue::ntdvdae

NDSolve::ntdvdae NDSolveValue::ntdvdae ParametricNDSolve::ntdvdae ParametricNDSolveValue::ntdvdae

Details

  • This message is issued when the solver cannot find an explicit formula for derivatives.
  • Off[message] switches off the message; On[message] switches it on. For example: Off[NDSolve::ntdvdae].

Examples

Basic Examples  (2)

An error occurs due to the square root:

Squaring both sides of the equation involving the square root resolves the issue:

This calculation fails because an explicit formula for cannot be found:

This example can be handled by solving numerically for the derivative and using that solution in the input to NDSolve: