diff --git a/src/lib.rs b/src/lib.rs
index 588f70e..c8805a8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1187,13 +1187,13 @@ impl MessageBehavior for VmcExtConfig {
             args: vec![OscType::from(self.path.to_owned())],
         };
     }
-    fn from_osc_message(msg: OscMessage) -> Result<Self, String> {
-        if msg.addr.len() != 1 {
-            return Err(String::from("arg count invalid"));
+    fn from_osc_message(msg: OscMessage) -> Result<Self, FromMessageErr> {
+        if msg.args.len() != 1 {
+            return Err(FromMessageErr::ArgCount(ArgCountErr { expected_in: vec![1], actual: msg.args.len(), addr: msg.addr }));
         }
         match &msg.args[0] {
             OscType::String(s) => return Ok(VmcExtConfig { path: s.to_owned() }),
-            _ => return Err(String::from("arg type invalid")),
+            _ => return Err(FromMessageErr::ArgType(ArgTypeErr { expected: OscType::String(String::new()), actual: msg.args[0], addr: msg.addr, arg_count: 0})),
         }
     }
 }