diff --git a/opm/autodiff/FlowMainSolvent.hpp b/opm/autodiff/FlowMainSolvent.hpp
index d3307f31e..5e1346996 100644
--- a/opm/autodiff/FlowMainSolvent.hpp
+++ b/opm/autodiff/FlowMainSolvent.hpp
@@ -107,6 +107,17 @@ namespace Opm
                                                  Base::deck_->hasKeyword("SOLVENT")));
         }
 
+        // run diagnostics
+        // Writes to:
+        //   logFile_
+        void runDiagnostics()
+        {
+            std::shared_ptr<Opm::StreamLog> streamLog = std::make_shared<Opm::StreamLog>(Base::logFile_, Opm::Log::DefaultMessageTypes);
+            const std::string msg = "Relperm diagnostic not implemented for the solvent model ";
+            std::cout << "\n" << msg << "\n" << std::endl;
+            streamLog->addMessage(Log::MessageType::Info, msg);
+        }
+
 
     };