diff --git a/pyinfinitensor/src/pyinfinitensor/onnx.py b/pyinfinitensor/src/pyinfinitensor/onnx.py
index a9be7d1e..9ba2e456 100644
--- a/pyinfinitensor/src/pyinfinitensor/onnx.py
+++ b/pyinfinitensor/src/pyinfinitensor/onnx.py
@@ -85,7 +85,7 @@ class OnnxStub:
         while len(sorted_nodes) < len(model.graph.node):
             updated = False
             for i, node in enumerate(model.graph.node):
-                if all(t in known_edge for t in node.input):
+                if all(t in known_edge or t == "" for t in node.input):
                     node.name = str(len(sorted_nodes)) + "_" + node.name
                     sorted_nodes.append(i)
                     known_edge.update(node.output)
@@ -653,15 +653,15 @@ class OnnxStub:
                         "nearest_mode",
                     ]
                 )
-                if len(node.input) > 1:
+                if len(node.input) > 1 and node.input[1] in data:
                     roiVal = _parse_data(data[node.input[1]])
                 else:
                     roiVal = []
-                if len(node.input) > 2:
+                if len(node.input) > 2 and node.input[2] in data:
                     scalesVal = _parse_data(data[node.input[2]])
                 else:
                     scalesVal = []
-                if len(node.input) > 3:
+                if len(node.input) > 3 and node.input[3] in data:
                     sizesVal = _parse_data(data[node.input[3]])
                 else:
                     sizesVal = []
@@ -669,9 +669,21 @@ class OnnxStub:
                     tensors[node.input[0]],
                     output,
                     axes,
-                    tensors[node.input[3]] if len(node.input) > 3 else None,
-                    tensors[node.input[2]] if len(node.input) > 2 else None,
-                    tensors[node.input[1]] if len(node.input) > 1 else None,
+                    (
+                        tensors[node.input[3]]
+                        if len(node.input) > 3 and node.input[3] != ""
+                        else None
+                    ),
+                    (
+                        tensors[node.input[2]]
+                        if len(node.input) > 2 and node.input[2] != ""
+                        else None
+                    ),
+                    (
+                        tensors[node.input[1]]
+                        if len(node.input) > 1 and node.input[1] != ""
+                        else None
+                    ),
                     sizesVal,
                     scalesVal,
                     roiVal,