diff --git a/src/runner/instance.rs b/src/runner/instance.rs
index d17d86e..88eec38 100644
--- a/src/runner/instance.rs
+++ b/src/runner/instance.rs
@@ -160,7 +160,7 @@ impl Instance{
 						let typed_value:f32=coerce_float32(&value).ok_or(mlua::Error::runtime("Expected f32"))?;
 						instance.properties.insert(index_str.to_owned(),rbx_types::Variant::Float32(typed_value));
 					},
-					other=>println!("Unimplemented property type: {other:?}"),
+					other=>return Err(mlua::Error::runtime(format!("Unimplemented property type: {other:?}"))),
 				}
 				Ok(())
 			})