Dear All, I want to solve a constricted pipe flow problem (for Re=100) using Navier Stokes equation with steady-state solver of Nektar++. By reading the user guide of Nektar++ I prepared solver info and parameters part of my xml file for this purpose as seen below: /* <SOLVERINFO>*//* *//* <I PROPERTY="EQTYPE" VALUE="SteadyLinearisedNS" />*//* *//* <I PROPERTY="Projection" VALUE="Continuous" />*//* *//* <I PROPERTY="Driver" VALUE="SteadyState" />*//* *//* <I PROPERTY="TimeIntegrationMethod" VALUE="IMEXOrder1" />*//* *//* </SOLVERINFO>*//* *//* *//* *//* <PARAMETERS>*//* *//* <P> ControlCoeff = 1 </P>*//* *//* <P> FilterWidth = 1 </P>*//* *//* <P> TOL = 10e-9 </P>*//* *//* <P> Kinvis = 0.1 </P>*//* *//* </PARAMETERS>*/ When I tried to run an analysis I got such an error: /*Fatal : Level 0 assertion violation*//* *//*EquationSystem 'SteadyLinearisedNS' is not defined.*//* *//*Ensure equation name is correct and module is compiled.*/ I also tried other equation types (Steady Stokes, Unsteady NS etc.) What is the source of this error? I also want to ask if it is possible to write a history file for steady solutions? Regards, Kamil