******************* This email originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list https://spam.ic.ac.uk/SpamConsole/Senders.aspx to disable email stamping for this address. ******************* Dear all, I have been running nektar++-5.0.2 and trying the 3D stability analysis for the channel flow as described in the specific nektar tutorial. I used the session file "PPF_R10000_3D.xml" provided under the /Tests subdirectory of IncNavierStokesSolver, and obtained the same complex eigenvalues 0.518448+/-26.6405i as the tutorial when I ran the problem on a single processor. However, when I executed the same session on multiple (4) processors, the two eigenvalues upon convergence were different, namely -6.957 +/-1.34189i. The corresponding eigenvectors also looked completely different than the results shown in the tutorial file. I experienced no such problems, however, when I ran the stability analysis with the "MultipleModes" option. Could there be an issue with the "SingleMode" option on multiple processors? I would be very grateful for your assistance. Best regards, Cheng