diff --git a/crates/sesam-vitale/src/cartevitale.rs b/crates/sesam-vitale/src/cartevitale.rs
index b1cb263..c535073 100644
--- a/crates/sesam-vitale/src/cartevitale.rs
+++ b/crates/sesam-vitale/src/cartevitale.rs
@@ -711,24 +711,19 @@ fn decode_carte_vitale(groups: Vec<Block>) -> Result<CarteVitale, String> {
                             .donnees_ruf_beneficiaire_complementaire =
                             String::from_utf8_lossy(field.content).to_string();
                     }
-                     _ => {}// {
-                    //             return Err(format!(
-                    //                 "Unknown (group, field) pair: ({}, {})",
-                    //                 group.id, field.id
-                    //             ))
-                    //         }
+                     _ =>  {
+                                return Err(format!(
+                                    "Unknown (group, field) pair: ({}, {})",
+                                    group.id, field.id
+                                ))
+                            }
                 }
             }
         }
     }
     Ok(cartevitale)
 }
-fn bytes_to_decimal_string(byte_array: &[u8]) -> String {
-    byte_array.iter()
-        .map(|byte| byte.to_string())
-        .collect::<Vec<String>>()
-        .join(" ")
-}
+
 // #[cfg(test)]
 // mod test_decode_carte_ps {
 //     use super::*;