diff --git a/src/main.rs b/src/main.rs
index d1ae7d2..cb3ab9d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -29,9 +29,15 @@ fn parse_config(conf: String, pool: &mut Vec<robot::Robot>) -> Result<world::Wor
         Some(raw) => raw,
     };
     let mut tokens = raw_line.split_whitespace();
-    let token1 = tokens.next();
-    let token2 = tokens.next();
-    println!("{}, {}", token1.unwrap(), token2.unwrap());
+    let token1 = match tokens.next() {
+        None => return Err("Could not read the first token of the first line !"),
+        Some(raw) => raw,
+    };
+    let token2 = match tokens.next() {
+        None => return Err("Could not read the second token of the first line !"),
+        Some(raw) => raw,
+    };
+    println!("{}, {}", token1, token2);
     Ok(world::World { x: 5, y: 5 })
 }