diff --git a/src/lib.rs b/src/lib.rs
index 0f8e332..588f70e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1134,9 +1134,9 @@ impl MessageBehavior for VmcExtSettingWin {
             args,
         };
     }
-    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("arg count invalid"));
+            return Err(FromMessageErr::ArgCount(ArgCountErr { expected_in: vec![4], actual: msg.args.len(), addr: msg.addr}));
         }
         let mut result = Self {
             is_top_most: false,
@@ -1149,28 +1149,28 @@ impl MessageBehavior for VmcExtSettingWin {
                 if i == 1 {
                     result.is_top_most = true;
                 } else if i != 0 {
-                    return Err(String::from("arg value invalid"));
+                    return Err(FromMessageErr::IntRange(IntRangeErr { expected_lower: 0, expected_upper: 1, actual: i, addr: msg.addr, arg_count: 0}));
                 }
             }
-            _ => return Err(String::from("arg type invalid")),
+            _ => return Err(FromMessageErr::ArgType(ArgTypeErr { expected: OscType::Int(0), actual: msg.args[0], addr: msg.addr, arg_count: 0})),
         }
         match msg.args[1] {
             OscType::Int(i) => {
                 if i == 1 {
                     result.is_transparent = true;
                 } else if i != 0 {
-                    return Err(String::from("arg value invalid"));
+                    return Err(FromMessageErr::IntRange(IntRangeErr { expected_lower: 0, expected_upper: 1, actual: i, addr: msg.addr, arg_count: 1}));
                 }
             }
-            _ => return Err(String::from("arg type invalid")),
+            _ => return Err(FromMessageErr::ArgType(ArgTypeErr { expected: OscType::Int(0), actual: msg.args[1], addr: msg.addr, arg_count: 1})),
         }
         match msg.args[2] {
             OscType::Int(i) => result.window_click_through = i,
-            _ => return Err(String::from("arg type invalid")),
+            _ => return Err(FromMessageErr::ArgType(ArgTypeErr { expected: OscType::Int(0), actual: msg.args[2], addr: msg.addr, arg_count: 2})),
         }
-        match msg.args[2] {
+        match msg.args[3] {
             OscType::Int(i) => result.hide_border = i,
-            _ => return Err(String::from("arg type invalid")),
+            _ => return Err(FromMessageErr::ArgType(ArgTypeErr { expected: OscType::Int(0), actual: msg.args[3], addr: msg.addr, arg_count: 3})),
         }
         return Ok(result);
     }