WOLFRAM

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

NDSolve::bcnorm NDSolveValue::bcnorm ParametricNDSolve::bcnorm ParametricNDSolveValue::bcnorm

Details

  • This message is generated when a boundary condition for a partial differential equation involves derivatives that are not normal to the boundary.
  • This problem can usually be resolved by checking that derivative boundary conditions are specified using the correct variable.
  • Off[message] switches off the message; On[message] switches it on. For example: Off[NDSolve::bcnorm].

Examples

Basic Examples  (1)

The boundary condition indicated in the message involves a derivative in a direction that is not perpendicular to the boundary:

The problem is with the condition . Making the change resolves this error message. It introduces a different one about the boundary conditions being inconsistent: