Index: Ringtoets/Common/src/Ringtoets.Common.Service/CalculationServiceHelper.cs
===================================================================
diff -u -re69acb9595f7bf1d202ddd1fb51934b66768b75d -r3e9eb63e09c270127a0db49f2dea3da5ff3a3639
--- Ringtoets/Common/src/Ringtoets.Common.Service/CalculationServiceHelper.cs	(.../CalculationServiceHelper.cs)	(revision e69acb9595f7bf1d202ddd1fb51934b66768b75d)
+++ Ringtoets/Common/src/Ringtoets.Common.Service/CalculationServiceHelper.cs	(.../CalculationServiceHelper.cs)	(revision 3e9eb63e09c270127a0db49f2dea3da5ff3a3639)
@@ -95,5 +95,18 @@
             log.Info(string.Format(Resources.Calculation_Subject_0_ended_Time_1_,
                                    name, DateTimeService.CurrentTimeAsString));
         }
+
+        /// <summary>
+        /// Determines whether an error has occurred during the calculation.
+        /// </summary>
+        /// <param name="canceled">The canceled state of the calculation.</param>
+        /// <param name="exceptionThrown">Indicator if there is already an exception thrown in the calculation.</param>
+        /// <param name="lastErrorFileContent">The contents of the last error file.</param>
+        /// <returns><c>true</c> when a calculation isn't canceled, has not already thrown an exception and 
+        /// <paramref name="lastErrorFileContent"/> is set. <c>false</c> otherwise.</returns>
+        public static bool ErrorOccurred(bool canceled, bool exceptionThrown, string lastErrorFileContent)
+        {
+            return !canceled && !exceptionThrown && !string.IsNullOrEmpty(lastErrorFileContent);
+        }
     }
 }
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