The time-dependent solver could not modify the initial conditions given to a DAE system to satisfy the stationary equations at the initial time. Make sure the initial values satisfy the equations and boundary conditions. In many cases, this can be achieved by solving for only the algebraic variables using a stationary solver before starting the time-dependent solver.
enough? Did you do a quality mesh and check for consistency? Couldn't
your problem be reduced to a 2D-problem anyway, which is very much
probably if you're able to apply a mapped mesh?