diff --git a/src/lib.rs b/src/lib.rs
index 030c872..0f8e332 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1080,26 +1080,26 @@ impl MessageBehavior for VmcExtSettingColor {
             ],
         };
     }
-    fn from_osc_message(msg: OscMessage) -> Result<Self, String> {
+    fn from_osc_message(msg: OscMessage) -> Result<Self, FromMessageErr> {
         if msg.args.len() != 4 {
-            return Err(String::from("argj count invalid"));
+            return Err(FromMessageErr::ArgCount(ArgCountErr { expected_in: vec![4], actual: msg.args.len(), addr: msg.addr}));
         }
         let mut color = Color::from_rgba(0.0, 0.0, 0.0, 0.0);
         match msg.args[0] {
             OscType::Float(f) => color.r = f,
-            _ => return Err(String::from("arg type invalid")),
+            _ => return Err(FromMessageErr::ArgType(ArgTypeErr { expected: OscType::Float(0.0), actual: msg.args[0], addr: msg.addr, arg_count: 0})),
         }
         match msg.args[1] {
             OscType::Float(f) => color.g = f,
-            _ => return Err(String::from("arg type invalid")),
+            _ => return Err(FromMessageErr::ArgType(ArgTypeErr { expected: OscType::Float(0.0), actual: msg.args[1], addr: msg.addr, arg_count: 1})),
         }
         match msg.args[2] {
             OscType::Float(f) => color.b = f,
-            _ => return Err(String::from("arg type invalid")),
+            _ => return Err(FromMessageErr::ArgType(ArgTypeErr { expected: OscType::Float(0.0), actual: msg.args[2], addr: msg.addr, arg_count: 2})),
         }
         match msg.args[3] {
             OscType::Float(f) => color.a = f,
-            _ => return Err(String::from("arg type invalid")),
+            _ => return Err(FromMessageErr::ArgType(ArgTypeErr { expected: OscType::Float(0.0), actual: msg.args[3], addr: msg.addr, arg_count: 3})),
         }
         return Ok(VmcExtSettingColor { color });
     }