diff --git a/AlgebraicDataflowArchitectureModel/src/algorithm/DataStorageNecessity.java b/AlgebraicDataflowArchitectureModel/src/algorithm/DataStorageNecessity.java
index 9f72b5f..5a6a8d1 100644
--- a/AlgebraicDataflowArchitectureModel/src/algorithm/DataStorageNecessity.java
+++ b/AlgebraicDataflowArchitectureModel/src/algorithm/DataStorageNecessity.java
@@ -10,16 +10,18 @@
 		ResourceDependencyGraph graph = model.getResourceDependencyGraph();
 		DataConstraintModel dcmodel = (DataConstraintModel) model;
 		for (ChannelGenerator generator : dcmodel.getChannelGenerators()) {
+			boolean flag = false;
 			for (ChannelMember member : ((DataflowChannelGenerator) generator).getOutputChannelMembers()) {
 				Expression curexp = member.getStateTransition().getCurStateExpression();
 				Expression nextexp = member.getStateTransition().getNextStateExpression();
-				boolean flag = false;
 				for (Position pos : curexp.getVariables().keySet()) {
 					if (nextexp.contains(curexp.getVariables().get(pos))) {
 						flag = true;
 					}
 				}
-				for (Node node : graph.getNodes()) {
+			}
+			for (Node node : graph.getNodes()) {
+				for (ChannelMember member : generator.getChannelMembers()) {
 					if (((ResourceNode) node).getIdentifierTemplate().equals(member.getIdentifierTemplate())) {
 						StoreAttribute store = new StoreAttribute();
 						store.setNeeded(flag);
@@ -29,7 +31,11 @@
 			}
 		}
 		for (Node node : graph.getNodes()) {
-			if (((ResourceNode) node).getAttribute() == null) {
+			if (((ResourceNode) node).getPredecessors().size() > 1) {
+				StoreAttribute store = new StoreAttribute();
+				store.setNeeded(true);
+				((ResourceNode) node).setAttribute(store);
+			} else if (((ResourceNode) node).getAttribute() == null) {
 				StoreAttribute store = new StoreAttribute();
 				store.setNeeded(false);
 				((ResourceNode) node).setAttribute(store);