Index: Ringtoets/Common/src/Ringtoets.Common.Service/DesignWaterLevelCalculationService.cs
===================================================================
diff -u -r874233bdb7814bef40b639e0fb4d26a0b86616a0 -r533cc8038f03f3acb30f4db787a3d583f93f7008
--- Ringtoets/Common/src/Ringtoets.Common.Service/DesignWaterLevelCalculationService.cs	(.../DesignWaterLevelCalculationService.cs)	(revision 874233bdb7814bef40b639e0fb4d26a0b86616a0)
+++ Ringtoets/Common/src/Ringtoets.Common.Service/DesignWaterLevelCalculationService.cs	(.../DesignWaterLevelCalculationService.cs)	(revision 533cc8038f03f3acb30f4db787a3d583f93f7008)
@@ -97,13 +97,16 @@
             {
                 calculator.Calculate(CreateInput(hydraulicBoundaryLocation, norm, hydraulicBoundaryDatabaseFilePath));
 
-                hydraulicBoundaryLocation.DesignWaterLevel = (RoundedDouble) calculator.DesignWaterLevel;
-                hydraulicBoundaryLocation.DesignWaterLevelCalculationConvergence =
-                    RingtoetsCommonDataCalculationService.CalculationConverged(calculator.ReliabilityIndex, norm);
-
-                if (hydraulicBoundaryLocation.DesignWaterLevelCalculationConvergence != CalculationConvergence.CalculatedConverged)
+                if (string.IsNullOrEmpty(calculator.LastErrorFileContent))
                 {
-                    log.Warn(messageProvider.GetCalculatedNotConvergedMessage(hydraulicBoundaryLocation.Name));
+                    hydraulicBoundaryLocation.DesignWaterLevel = (RoundedDouble)calculator.DesignWaterLevel;
+                    hydraulicBoundaryLocation.DesignWaterLevelCalculationConvergence =
+                        RingtoetsCommonDataCalculationService.CalculationConverged(calculator.ReliabilityIndex, norm);
+
+                    if (hydraulicBoundaryLocation.DesignWaterLevelCalculationConvergence != CalculationConvergence.CalculatedConverged)
+                    {
+                        log.Warn(messageProvider.GetCalculatedNotConvergedMessage(hydraulicBoundaryLocation.Name));
+                    }
                 }
             }
             catch (HydraRingFileParserException)