******************* 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. ******************* Hello Nektar community, I want to simulate a two-pass square channel with rotation effect using the Nektar++ solver. First, I tested 2D geometry, and it worked. However, when I tried to add rotation, it didn't work. As far as I'm aware, Nektar's rotation is constrained on the z axis, therefore I built my channel around that. I created "GEOMETRY DIM="2" SPACE="3">" so that a 2D mesh could be obtained in 3D space and rotated about the z-axis. Nevertheless, I keep getting the message "Fatal: Level 0 assertion violation output coord 2 is not defined." Who can advise me on what to do? I truly appreciate it. Thanks, Ali A. Abdulrasool -- *University of Kerbala* website : https://uokerbala.edu.iq/en/ <https://uokerbala.edu.iq/en/> Location : https://goo.gl/maps/pNQ9LkdMbi72 <https://goo.gl/maps/pNQ9LkdMbi72> *This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. *