diff --git a/Node_Editor/Framework/NodeEditor.cs b/Node_Editor/Framework/NodeEditor.cs
index 25fdec2f..0c4067ff 100644
--- a/Node_Editor/Framework/NodeEditor.cs
+++ b/Node_Editor/Framework/NodeEditor.cs
@@ -370,8 +370,11 @@ private static bool ContinueCalculation (Node node)
 					for (int outCnt = 0; outCnt < node.Outputs.Count; outCnt++)
 					{
 						NodeOutput output = node.Outputs [outCnt];
-						for (int conCnt = 0; conCnt < output.connections.Count; conCnt++)
-							ContinueCalculation (output.connections [conCnt].body);
+						if (!output.calculationBlockade)
+						{
+							for (int conCnt = 0; conCnt < output.connections.Count; conCnt++)
+								ContinueCalculation (output.connections [conCnt].body);
+						}
 					}
 				}
 				else if (calculationCount >= 1000)
diff --git a/Node_Editor/Framework/NodeOutput.cs b/Node_Editor/Framework/NodeOutput.cs
index 6a7433c3..6a02661f 100644
--- a/Node_Editor/Framework/NodeOutput.cs
+++ b/Node_Editor/Framework/NodeOutput.cs
@@ -24,6 +24,8 @@ public class NodeOutput : NodeKnob
 		[System.NonSerialized]
 		private object value = null;
 
+		public bool calculationBlockade = false;
+
 		#region General
 
 		/// <summary>