diff --git a/kclvm/evaluator/src/ty.rs b/kclvm/evaluator/src/ty.rs
index 4f4504e6b..161afcc6a 100644
--- a/kclvm/evaluator/src/ty.rs
+++ b/kclvm/evaluator/src/ty.rs
@@ -137,12 +137,12 @@ pub fn type_pack_and_check(
             }
         }
         panic!(
-            "expect {expected_type}, got {}.{}",
+            "expect {expected_type}, got {}{}",
             val_plan::type_of(value, true),
             if error_msgs.is_empty() {
                 "".to_string()
             } else {
-                format!("For details:\n{}", error_msgs.join("\n"))
+                format!(". For details:\n{}", error_msgs.join("\n"))
             }
         );
     }
diff --git a/test/grammar/types/runtime_ty/runtime_ty_err_0/stderr.golden b/test/grammar/types/runtime_ty/runtime_ty_err_0/stderr.golden
index 95f352159..3d1ce11fa 100644
--- a/test/grammar/types/runtime_ty/runtime_ty_err_0/stderr.golden
+++ b/test/grammar/types/runtime_ty/runtime_ty_err_0/stderr.golden
@@ -2,5 +2,7 @@ error[E3M38]: EvaluationError
  --> ${CWD}/main.k:7:1
   |
 7 | person: Person = json.decode('{"err_name": "Alice", "age": 18}')
-  |  expect Person, got dict
+  |  expect Person, got dict.For details:
+Schema Person does not contain attribute err_name
+Schema Person's attribute name is missing
   |
\ No newline at end of file
diff --git a/test/grammar/types/type_as/type_as_err_2/stderr.golden b/test/grammar/types/type_as/type_as_err_2/stderr.golden
index 9d5e5183e..dda8d20c1 100644
--- a/test/grammar/types/type_as/type_as_err_2/stderr.golden
+++ b/test/grammar/types/type_as/type_as_err_2/stderr.golden
@@ -2,5 +2,7 @@ error[E3M38]: EvaluationError
  --> ${CWD}/main.k:8:1
   |
 8 | bar = foo as Bar
-  |  expect Bar, got Foo
+  |  expect Bar, got Foo.For details:
+Schema Bar does not contain attribute foo
+Schema Bar's attribute bar is missing
   |
diff --git a/test/grammar/types/type_as/type_as_err_3/stderr.golden b/test/grammar/types/type_as/type_as_err_3/stderr.golden
index 8dc529e3c..dd2933cd8 100644
--- a/test/grammar/types/type_as/type_as_err_3/stderr.golden
+++ b/test/grammar/types/type_as/type_as_err_3/stderr.golden
@@ -2,5 +2,7 @@ error[E3M38]: EvaluationError
   --> ${CWD}/child/child.k:15:1
    |
 15 | base_a: A = _base_a as A
-   |  expect A, got base.A
+   |  expect A, got base.A.For details:
+Schema A does not contain attribute bar
+Schema A's attribute foo is missing
    |
diff --git a/test/grammar/types/type_as/type_as_err_4/stderr.golden b/test/grammar/types/type_as/type_as_err_4/stderr.golden
index 857ba7d21..d363e7192 100644
--- a/test/grammar/types/type_as/type_as_err_4/stderr.golden
+++ b/test/grammar/types/type_as/type_as_err_4/stderr.golden
@@ -2,5 +2,7 @@ error[E3M38]: EvaluationError
   --> ${CWD}/main.k:18:1
    |
 18 | child_a = _child_a as A
-   |  expect A, got child.A
+   |  expect A, got child.A. For details:
+Schema A does not contain attribute foo
+Schema A's attribute main is missing
    |