diff --git a/source/java/org/alfresco/repo/workflow/activiti/ActivitiScriptNode.java b/source/java/org/alfresco/repo/workflow/activiti/ActivitiScriptNode.java
index 884fdc822e..63a65da7d7 100644
--- a/source/java/org/alfresco/repo/workflow/activiti/ActivitiScriptNode.java
+++ b/source/java/org/alfresco/repo/workflow/activiti/ActivitiScriptNode.java
@@ -22,10 +22,10 @@ import java.io.Serializable;
 import java.util.Date;
 
 import org.alfresco.repo.jscript.ScriptNode;
-import org.alfresco.repo.workflow.jbpm.JBPMNode;
 import org.alfresco.service.ServiceRegistry;
 import org.alfresco.service.cmr.repository.NodeRef;
 import org.alfresco.service.namespace.QName;
+import org.mozilla.javascript.Context;
 import org.mozilla.javascript.Scriptable;
 
 /**
@@ -80,9 +80,14 @@ public class ActivitiScriptNode extends ScriptNode
         @Override
         public Serializable convertValueForScript(ServiceRegistry serviceRegistry, Scriptable theScope, QName qname, Serializable value)
         {
+        	// ALF-14863: If script-node is used outside of Script-call (eg. Activiti evaluating an expression that contains variables of type ScriptNode)
+        	// a scope should be created solely for this conversion. The scope will ALWAYS be set when value-conversion is called from the
+        	// ScriptProcessor
+        	ensureScopePresent();
+        	
             if (value instanceof NodeRef)
             {
-                return new JBPMNode(((NodeRef)value), serviceRegistry);
+                return new ActivitiScriptNode(((NodeRef)value), serviceRegistry);
             }
             else if (value instanceof Date)
             {
@@ -93,5 +98,27 @@ public class ActivitiScriptNode extends ScriptNode
                 return super.convertValueForScript(serviceRegistry, theScope, qname, value);
             }
         }
+
+		private void ensureScopePresent() {
+			if(scope == null) {
+				// Create a scope for the value conversion. This scope will be an empty scope exposing basic Object and Function, sufficient for value-conversion.
+				// In case no context is active for the current thread, we can safely enter end exit one to get hold of a scope
+				Context ctx = Context.getCurrentContext();
+				boolean closeContext = false;
+				if(ctx == null) 
+				{
+					ctx = Context.enter();
+					closeContext = true;
+				}
+				
+				scope = ctx.initStandardObjects();
+				scope.setParentScope(null);
+				
+				if(closeContext) {
+					// Only an exit call should be done when context didn't exist before
+					Context.exit();
+				}
+			}
+		}
     }
 }
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