Hi! I've been playing around with the Sm solver for a while, and now I have a couple of questions: Is there any working non-reflecting boundary condition implemented that works well for the elastodynamic equations. I tried the pmlABC option but that made the code abort with an STOP 22555 message. I also tried the abcEM2 which worked but if that really is the Engquist-Majda condition it wouldn't be optimal for the Sm application, would it? Is there any other option? Running the SOS solver, there is a dissipation parameter (default value 0.0), how does that work with a non-zero value? /Stefan