diff --git a/copper_derive/Cargo.toml b/copper_derive/Cargo.toml
index 302da25c0..84acbbc34 100644
--- a/copper_derive/Cargo.toml
+++ b/copper_derive/Cargo.toml
@@ -7,11 +7,12 @@ edition = "2021"
 proc-macro = true
 
 [dependencies]
-syn = { version = "2.0.63", features = ["full"]}
+syn = { version = "2.0.63", features = ["full"] }
 quote = "1.0.36"
 proc-macro2 = { version = "1.0.82" }
 walkdir = "2.5.0"
 syntect = "5.2.0"
+backtrace = "0.3.71"
 copper = { path = "../copper" }
 
 [build-dependencies]
diff --git a/copper_derive/src/lib.rs b/copper_derive/src/lib.rs
index 08a894554..7a4d72eff 100644
--- a/copper_derive/src/lib.rs
+++ b/copper_derive/src/lib.rs
@@ -2,10 +2,13 @@ extern crate proc_macro;
 
 use proc_macro::TokenStream;
 
-use quote::quote;
-use syn::{Field, ItemStruct, LitStr, parse_macro_input, parse_quote, parse_str, Type, TypeTuple};
-use syn::Fields::{Named, Unit, Unnamed};
+use backtrace::Backtrace;
+use std::panic;
+
+use quote::{quote, ToTokens};
 use syn::meta::parser;
+use syn::Fields::{Named, Unit, Unnamed};
+use syn::{parse_macro_input, parse_quote, parse_str, Field, ItemStruct, LitStr, Type, TypeTuple};
 
 use copper::config::CopperConfig;
 use format::{highlight_rust_code, rustfmt_generated_code};
@@ -42,8 +45,9 @@ pub fn copper_runtime(args: TokenStream, input: TokenStream) -> TokenStream {
     let (all_tasks_types_names, all_tasks_types) = extract_tasks_types(&copper_config);
 
     // Build the tuple of all those types
+    // note the extraneous , at the end is to make the tuple work even if this is only one element
     let task_types_tuple: TypeTuple = parse_quote! {
-        (#(#all_tasks_types),*)
+        (#(#all_tasks_types),*,)
     };
 
     // add that to a new field
@@ -53,14 +57,11 @@ pub fn copper_runtime(args: TokenStream, input: TokenStream) -> TokenStream {
 
     let (all_msgs_types_names, all_msgs_types) = extract_msgs_types(&copper_config);
 
-    // Build the tuple of all those types
-    let msgs_types_tuple: TypeTuple = parse_quote! {
-        (#(#all_msgs_types),*)
-    };
+    let msgs_types_tuple: TypeTuple = parse_quote! { (#(#all_msgs_types),*,)};
 
     let copper_lists_field: Field = parse_quote! {
-        copper_lists: CircularQueue<CopperList, 10>
-    }
+        copper_lists: CircularQueue<CopperList, U1>
+    };
 
     let name = &item_struct.ident;
 
@@ -71,7 +72,7 @@ pub fn copper_runtime(args: TokenStream, input: TokenStream) -> TokenStream {
         }
         Unnamed(fields_unnamed) => {
             fields_unnamed.unnamed.push(task_instances_field);
-            fields_unnamed.unnamed.push(copper_lists_field);
+            // fields_unnamed.unnamed.push(copper_lists_field);
         }
         Unit => {
             // Handle unit structs if necessary
@@ -95,10 +96,21 @@ pub fn copper_runtime(args: TokenStream, input: TokenStream) -> TokenStream {
         })
         .collect();
 
+    // Generate the code to create instances of the messages
+    let msg_instances_init_code: Vec<_> = all_msgs_types
+        .iter()
+        .map(|ty| {
+            quote! {
+                #ty::default()
+            }
+        })
+        .collect();
+
     // Convert the modified struct back into a TokenStream
     let result = quote! {
         use std::fs::read_to_string;
         use copper::common::CircularQueue;
+        use copper::common::U1;
         use copper::config::Node;
         use copper::config::CopperConfig;
         use copper::config::NodeInstanceConfig;
@@ -123,19 +135,20 @@ pub fn copper_runtime(args: TokenStream, input: TokenStream) -> TokenStream {
                 let all_instances_configs: Vec<Option<&NodeInstanceConfig>>  = copper_config.get_all_nodes().iter().map(|node_config| node_config.get_instance_config()).collect();
 
                 let task_instances = (
-                    #(#task_instances_init_code),*
+                    #(#task_instances_init_code),*,
                 );
                 Ok(#name {
                     task_instances,
+                    copper_lists: Box::new(CircularQueue::new()),
                 })
             }
 
-            pub fn hello(&self) {
-                println!("Hello from CopperRuntime");
-            }
+            //fn create_new_copper_list() -> CopperList {
+            //    (#(#msg_instances_init_code),*,)
+            //}
+
         }
     };
-
     let tokens: TokenStream = result.into();
 
     // Print and format the generated code using rustfmt
@@ -161,10 +174,7 @@ fn extract_tasks_types(copper_config: &CopperConfig) -> (Vec<String>, Vec<Type>)
     // Transform them as Rust types
     let all_types: Vec<Type> = all_types_names
         .iter()
-        .map(|name| {
-            println!("Found type: {}", name);
-            parse_str(name).unwrap()
-        })
+        .map(|name| parse_str(name).unwrap())
         .collect();
     (all_types_names, all_types)
 }
@@ -184,10 +194,7 @@ fn extract_msgs_types(copper_config: &CopperConfig) -> (Vec<String>, Vec<Type>)
     // Transform them as Rust types
     let all_types: Vec<Type> = all_types_names
         .iter()
-        .map(|name| {
-            println!("Found type: {}", name);
-            parse_str(name).unwrap()
-        })
+        .map(|name| parse_str(name).unwrap())
         .collect();
     (all_types_names, all_types)
 }
diff --git a/examples/v4lsrc/src/lib.rs b/examples/v4lsrc/src/lib.rs
index b5357b402..23a9b9513 100644
--- a/examples/v4lsrc/src/lib.rs
+++ b/examples/v4lsrc/src/lib.rs
@@ -21,6 +21,15 @@ impl Default for ImageMsg {
     }
 }
 
+impl PartialEq for ImageMsg {
+    fn eq(&self, other: &Self) -> bool {
+        self.buffer
+            .iter()
+            .flatten()
+            .eq(other.buffer.iter().flatten())
+    }
+}
+
 impl ImageMsg {
     fn copy_from(&mut self, buff_src: &[u8]) {
         let mut x = 0usize;