From ab5cfb798706a0fe94f71cde91a1f386010d0105 Mon Sep 17 00:00:00 2001
From: Cristopher Morales
 <98025159+Cristopher-Morales@users.noreply.github.com>
Date: Wed, 28 Aug 2024 10:11:13 +0200
Subject: [PATCH] small fix (#2345)

---
 Common/src/CConfig.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Common/src/CConfig.cpp b/Common/src/CConfig.cpp
index ec4a555d6af..ef78d7ac095 100644
--- a/Common/src/CConfig.cpp
+++ b/Common/src/CConfig.cpp
@@ -3920,6 +3920,13 @@ void CConfig::SetPostprocessing(SU2_COMPONENT val_software, unsigned short val_i
         SU2_MPI::Error("The use of FLUID_MIXTURE requires the INC_DENSITY_MODEL option to be VARIABLE",
                        CURRENT_FUNCTION);
       }
+      /*--- Check whether the Kind scalar model used is correct, in the case of FLUID_MIXTURE the kind scalar model must
+       be SPECIES_TRANSPORT. Otherwise, if the scalar model is NONE, the species transport equations will not be solved.
+       --- */
+      if (Kind_Species_Model != SPECIES_MODEL::SPECIES_TRANSPORT) {
+        SU2_MPI::Error("The use of FLUID_MIXTURE requires the KIND_SCALAR_MODEL option to be SPECIES_TRANSPORT",
+                       CURRENT_FUNCTION);
+      }
 
       switch (Kind_ViscosityModel) {
         case VISCOSITYMODEL::CONSTANT: