diff --git a/AlgebraicDataflowArchitectureModel/src/application/editor/Editor.java b/AlgebraicDataflowArchitectureModel/src/application/editor/Editor.java
index d5ca291..a9f4355 100644
--- a/AlgebraicDataflowArchitectureModel/src/application/editor/Editor.java
+++ b/AlgebraicDataflowArchitectureModel/src/application/editor/Editor.java
@@ -797,9 +797,11 @@
 			Map<ChannelMember, Map.Entry<ResourcePath, Set<ChannelMember>>> dependency = ch.fillOutsideResourcePaths(ch.getOutputChannelMembers().iterator().next(), JavaCodeGenerator.pullAccessor);
 			for (ChannelMember srcMem: dependency.keySet()) {
 				ResourceNode srcNode = dataFlowGraph.getResourceNode(srcMem.getResource());
-				for (ChannelMember dstMem: dependency.get(srcMem).getValue()) {
-					ResourceNode dstNode = dataFlowGraph.getResourceNode(dstMem.getResource());
-					resourceDpendency.add(new AbstractMap.SimpleEntry<>(srcNode, dstNode));
+				if (srcNode != null) {
+					for (ChannelMember dstMem: dependency.get(srcMem).getValue()) {
+						ResourceNode dstNode = dataFlowGraph.getResourceNode(dstMem.getResource());
+						resourceDpendency.add(new AbstractMap.SimpleEntry<>(srcNode, dstNode));
+					}
 				}
 			}
 		} catch (ParameterizedIdentifierIsFutureWork | ResolvingMultipleDefinitionIsFutureWork | InvalidMessage