Hi Subhasisa, You can solve this by either defining NEK or adding nektart++ bin to the PATH in the ~/.bashrc export NEK=/home/gaoak/nektar/build/dist/bin export PATH=/home/gaoak/nektar/build/dist/bin:$PATH Cheers Ankang ________________________________ From: nektar-users-bounces@imperial.ac.uk <nektar-users-bounces@imperial.ac.uk> on behalf of subhasisar@campus.technion.ac.il <subhasisar@campus.technion.ac.il> Sent: 28 August 2022 13:31 To: nektar-users <nektar-users@imperial.ac.uk> Subject: Re: [Nektar-users] Installation of Nektar++ on Ubuntu 22.04 This email from subhasisar@campus.technion.ac.il originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list<https://spam.ic.ac.uk/SpamConsole/Senders.aspx> to disable email stamping for this address. Hello, After a successful compilation of Nektar++ v 5.2.0 from its source code in Ubuntu 22.04, all ctest cases passed. However, when I am trying to simulate the tutorial case (attached link), I am unable to execute the commands, and it shows the following error. https://doc.nektar.info/tutorials/latest/basics/advection-diffusion/basics-a... ERROR: subhasisar@aeterzis07:~/nektar-v5.2.0/basics-advection-diffusion/tutorial$ $NEK/NekMesh ADR_mesh.msh ADR_mesh.xml bash: /NekMesh: No such file or directory Can you suggest anything in this regard. Do I need to add anything in my system /.bashrc? Best, Subhasisa Rath ________________________________ From: Subhasisa Rath <subhasisar@campus.technion.ac.il> Sent: Sunday, August 21, 2022 5:03 PM To: nektar-users@imperial.ac.uk <nektar-users@imperial.ac.uk> Subject: Installation of Nektar++ on Ubuntu 22.04 Hello. I am Dr Subhasisa Rath from Technion - Israel Institute of Technology. I would like to install nektar++ on my Ubuntu 22.04 OS. I am not able to find any source-code for this OS. May I know whether I can install or not on OS? Best, Subhasisa