OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › Bug Reports › error compile in olb1.4 (ok in olb 1.2) › Reply To: error compile in olb1.4 (ok in olb 1.2) November 2, 2021 at 11:44 am #6135 AdrianKeymaster Release 1.4 introduced new boundary setters for applying boundary conditions to the lattice. You can see this in the examples included by the release as well as the user guide.