Hi Neks, I have generated a mesh in ICEM CFD software. And exported mesh in .exo format. Then I have used exo2nex to convert mesh. while running the case one error is showing. That error is shown below 0 ERROR: Vanishing Jacobian near 5th node of element 1. 1.10361832315621911E-002 -6.75425029014820044E-003 0 xyz: 2.06376E-01 3.94255E-02 0 xyz: 2.27305E-01 3.94255E-02 0 0.0000E+00 Write checkpoint 0 0.0000E+00 OPEN: xyzexodus.fld01 Jac error 1, setting p66=4, ifxyo=t an error occured: dying ... I am not able to solve this problem. Kindly help me with this. Thank you Alok Mishra Research Scholar Computational Propulsion Lab Aerospace Department IIT Kanpur