Hi Syavash, I assume you enclosed the filter in a filters tag as below, right? If you have other filters, all goes inside <FILTERS> …. </FILTERS> tags too. Eg. If you have FilterAeroforces too, all will looks like: <FILTERS> <FILTER TYPE="ReynoldsStresses"> <PARAM NAME="OutputFile">step95_4_averageField.fld</PARAM> <PARAM NAME="OutputFrequency">10</PARAM> <PARAM NAME="SampleFrequency"> 1 </PARAM> </FILTER> <FILTER TYPE=”AeroForces”> <PARAM NAME=”OutputFile”>forces</PARAM> <PARAM NAME="OutputFrequency">10</PARAM> <PARAM NAME="SampleFrequency"> 1 </PARAM> </FILTER> </FILTERS> Hope this helps, Cheers, Mohsen From: nektar-users-bounces@imperial.ac.uk <nektar-users-bounces@imperial.ac.uk> on behalf of Ehsan Asgari <eh.asgari@gmail.com> Date: Tuesday, 4 April 2023 at 19:53 To: nektar-users@imperial.ac.uk <nektar-users@imperial.ac.uk> Subject: [Nektar-users] Reynolds stress field not written ⚠ External sender. Take care when opening links or attachments. Do not provide your login details. This email from eh.asgari@gmail.com 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://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fspam.ic.ac.uk%2FSpamConsole%2FSenders.aspx&data=05%7C01%7Cmohsen.lahooti%40newcastle.ac.uk%7C1aac161cbef24fc8f10e08db353debe9%7C9c5012c9b61644c2a91766814fbe3e87%7C1%7C0%7C638162312282309229%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=ENezieJhRADCounPBTrN1IAVsmLXlfb1InVgYB1v8tU%3D&reserved=0> to disable email stamping for this address. Dear All, I have added the ReynoldsStresses filter to the main Nektar block in my session file: <FILTER TYPE="ReynoldsStresses"> <PARAM NAME="OutputFile">step95_4_averageField.fld</PARAM> <PARAM NAME="OutputFrequency">10</PARAM> <PARAM NAME="SampleFrequency"> 1 </PARAM> </FILTER> I am doing parallel simulations using 128 cores. However, I get no Reynolds stress fields in my directory. I don't get any errors or warnings either. Am I missing something? Kind regards syavash