<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head><body>Dear all,<div><br></div><div>I have recently changed my hydro simulations to the Refluxing strategy implemented by Erik Schnetter. For this I have changed the standard configuration to a <b>cell centred refinement, staggered boundaries and low order spatial prolongation for the hydro variables</b>. Since then I experience problems with BSSN or, more specifically, the QuasilocalMeasures thorn (a=0.9 black hole). After an initially fine behaviour, <b>no Eigenvector with value one is found and the spacetime gradually crashes</b>. </div><div><br></div><div>I am still puzzled where this is coming from. Does anybody have some experience with the combination spacetime evolution + hydro refluxing, i.e. the somewhat different grid setup? I would be glad for any input to see where I start to fix my work.</div><div><br></div><div>Thank you very much and my best from Valencia </div><div><br></div><div>Jens </div></body></html>