diff --git a/reference_model/src/ops/data_layout.cc b/reference_model/src/ops/data_layout.cc
index 05a11e0..387152f 100644
--- a/reference_model/src/ops/data_layout.cc
+++ b/reference_model/src/ops/data_layout.cc
@@ -661,18 +661,26 @@
 
     ASSERT_MEM(in && out);
 
+    ERROR_IF(attribute->perm().size() != Rank, "OpTranspose: perm array size needs to match rank(input)");
+
+    std::array<bool, Rank> index_used;
+    index_used.fill(false);
+    for (int32_t d = 0; d < Rank; d++)
+    {
+        int32_t index = attribute->perm()[d];
+        ERROR_IF(index < 0 or index >= Rank, "OpTranspose: index out of boundary");
+        ERROR_IF(index_used[index], "OpTranspose: index duplicated in perm attribute");
+        index_used[index] = true;
+        ERROR_IF(in->getShape()[index] != out->getShape()[d], "OpTranspose: input output shape mismatch");
+        perm_array[d] = index;
+    }
+
     return 0;
 }
 
 template <int Rank, DType Dtype>
 int OpTranspose<Rank, Dtype>::eval()
 {
-    for (int32_t d = 0; d < Rank; d++)
-    {
-        perm_array[d] = attribute->perm()[d];
-        ERROR_IF(perm_array[d] < 0 or perm_array[d] >= Rank, "OpTranspose: index out of boundary");
-    }
-
     out->getTensor() = in->getTensor().shuffle(perm_array);
 
     return GraphNode::eval();
diff --git a/reference_model/src/ops/ewise_binary.cc b/reference_model/src/ops/ewise_binary.cc
index 415cd1c..b199f69 100644
--- a/reference_model/src/ops/ewise_binary.cc
+++ b/reference_model/src/ops/ewise_binary.cc
@@ -512,6 +512,7 @@
     }
 
     ERROR_IF(inputs[0]->getDtype() != InDtype, "OpTable: Unexpected input type");
+    ERROR_IF(outputs[0]->getDtype() != OutDtype, "OpTable: Unexpected output type");
     ERROR_IF(attribute->table().size() != TableNumEntries, "OpTable: table attribute size must be %u", TableNumEntries);
 
     for (uint32_t i = 0; i < TableNumEntries; i++)