Valid surface load label. Load labels are listed under "Surface Loads" in the input table for each element type in the Element Reference.Discipline Surface Load Label Label DescriptionStructural PRES pressure (real pressure only)Thermal CONV[1] convection (bulk temperatures only) HFLUX[1] heat fluxElectric CHRGS surface charge densityDiffusion DFLUX Diffusion fluxThermal labels CONV and HFLUX are mutually exclusive.