Dear Neks, I was wondering if someone could help us to identify correctness tests for Nekbone. How can we make sure that after modifying the code we still get a valid output? Is there anything we can use from the printed output, for instance |/cg: ||0| |3||.9174E+||02| /|/comm time ||0||.2370E-||01| /|/cg: ||101| |2||.9280E-||05| |4||.3327E-||01| |7||.6135E-||01| /|/2||.5748E-||09| /|/cg: ||0| |4||.0900E+||02| /|/comm time ||0||.2232E-||01| /|/cg: ||101| |1||.0800E-||05| |4||.4507E-||01| |7||.4233E-||01| /|/3||.4828E-||10| /|/| /|/nelt = ||64||, np = ||8||, nx1 = ||10||, elements /= ||512| |/Tot MFlops = ||4||.0983E+||04||, MFlops = ||5||.1228E+||03| /|/Setup Flop = ||8||.8960E+||08||, Solver Flop = ||9||.6960E+||07| /|/Solve Time = ||0||.1926E+||00| /|/Avg MFlops = ||4||.0983E+||04| / Thanks for your help! The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.