Index: Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.IO/Exporters/MacroStabilityInwardsCalculationGroupExporter.cs
===================================================================
diff -u -r380f2075e3cc1eaa4c497360c1df9e909d0a6f87 -r130df59d469fe5daf7db042cebf3939b926008d6
--- Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.IO/Exporters/MacroStabilityInwardsCalculationGroupExporter.cs	(.../MacroStabilityInwardsCalculationGroupExporter.cs)	(revision 380f2075e3cc1eaa4c497360c1df9e909d0a6f87)
+++ Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.IO/Exporters/MacroStabilityInwardsCalculationGroupExporter.cs	(.../MacroStabilityInwardsCalculationGroupExporter.cs)	(revision 130df59d469fe5daf7db042cebf3939b926008d6)
@@ -137,6 +137,8 @@
             {
                 if (Directory.Exists(tempFolderPath))
                 {
+                    ForceZipFileToReleaseAllFileHandles();
+
                     Directory.Delete(tempFolderPath, true);
                 }
             }
@@ -228,5 +230,11 @@
             var fileNameWithExtension = $"{fileName}.{fileExtension}";
             return Path.Combine(currentFolderPath, fileNameWithExtension);
         }
+
+        private static void ForceZipFileToReleaseAllFileHandles()
+        {
+            GC.Collect();
+            GC.WaitForPendingFinalizers();
+        }
     }
 }
\ No newline at end of file