OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › BounceBackVelocity › Reply To: BounceBackVelocity October 11, 2021 at 5:02 pm #6073 sahilbhapkar30Participant Hello, I tried setting the above Boundary conditions and I received the following error. error: ‘setBounceBackVelocityBoundary’ was not declared in this scope. What would be the reason? Thank you, Sahil