Index: Riskeer/Piping/src/Riskeer.Piping.Service/SemiProbabilistic/SemiProbabilisticPipingCalculationService.cs
===================================================================
diff -u -rceee4b5279e60182c55f5e8e6a2c1c640b7c012f -rfdde4adb6f049367d85940d7b471462954726253
--- Riskeer/Piping/src/Riskeer.Piping.Service/SemiProbabilistic/SemiProbabilisticPipingCalculationService.cs	(.../SemiProbabilisticPipingCalculationService.cs)	(revision ceee4b5279e60182c55f5e8e6a2c1c640b7c012f)
+++ Riskeer/Piping/src/Riskeer.Piping.Service/SemiProbabilistic/SemiProbabilisticPipingCalculationService.cs	(.../SemiProbabilisticPipingCalculationService.cs)	(revision fdde4adb6f049367d85940d7b471462954726253)
@@ -177,8 +177,12 @@
 
             validationResults.AddRange(ValidateHydraulics(input, normativeAssessmentLevel));
             validationResults.AddRange(PipingCalculationValidationHelper.GetValidationErrors(input));
-            validationResults.AddRange(ValidateCoverageLayers(input, generalInput));
 
+            if (!validationResults.Any())
+            {
+                validationResults.AddRange(ValidateCoverageLayers(input, generalInput));
+            }
+
             return validationResults;
         }