diff --git a/graph_net/constraint_util.py b/graph_net/constraint_util.py
index d58bb8fc7..c1fa443eb 100644
--- a/graph_net/constraint_util.py
+++ b/graph_net/constraint_util.py
@@ -231,8 +231,9 @@ def update_tensor_metas_by_dyn_dim_cstr(
     tensor_metas: list[TensorMeta], dyn_dim_cstr: DynamicDimConstraints
 ):
     input_shapes = dyn_dim_cstr.get_reified_input_shapes()
-    assert len(tensor_metas) == len(input_shapes)
-    for i, tensor_meta in enumerate(tensor_metas):
+    # Only update input tensors (first len(input_shapes) tensors), skip weight tensors
+    for i in range(min(len(input_shapes), len(tensor_metas))):
+        tensor_meta = tensor_metas[i]
         tensor_meta.shape = input_shapes[i]
         if tensor_meta.data is not None:
             assert isinstance(tensor_meta.data, (list, tuple))
diff --git a/graph_net/dimension_generalizer.py b/graph_net/dimension_generalizer.py
index da754d6d8..e8ac50731 100644
--- a/graph_net/dimension_generalizer.py
+++ b/graph_net/dimension_generalizer.py
@@ -137,14 +137,41 @@ def _save_tensor_metas_as_weight_meta(self, to_model_path, tensor_metas):
         (to_model_path / "weight_meta.py").write_text(weight_meta_code)
 
     def _get_to_model_path(self, rel_model_path, symbol2example_value):
-        sym_dim_str = "_".join(
-            f"{sym_name}_{dim}"
-            for symbol, dim in symbol2example_value.items()
-            for sym_name in [symbol.name]
+        """
+        Generates output paths organized by dimension configuration indices rather than
+        symbolic dimension strings.
+
+        Path structure transformation:
+        Before: model_name__symbolic_dims (e.g., 'model1__symA_8_symB_16')
+        After: index/model_name (e.g., '0/model1', '1/model1')
+
+        The index represents a specific dimension configuration from the reification set,
+        enabling systematic management of dimension variations.
+        """
+        # Use indices instead of symbol strings
+        symbols, reified_dims = self._get_symbols_and_reified_dims(
+            Path(self.config["model_path_prefix"]) / rel_model_path,
+            DynamicDimConstraints.unserialize_from_py_file(
+                os.path.join(
+                    self.config["model_path_prefix"],
+                    rel_model_path,
+                    "input_tensor_constraints.py",
+                )
+            ),
         )
-        sub_module_name = f"{os.path.basename(rel_model_path)}__{sym_dim_str}"
+        current_dims = tuple(symbol2example_value[symbol] for symbol in symbols)
+
+        # Find corresponding index through dimension value matching
+        dim_index = 0
+        for i, dims in enumerate(reified_dims):
+            if tuple(dims) == current_dims:
+                dim_index = i
+                break
+
+        # Path structure changed from model/name to index/model
+        sub_module_name = f"{dim_index}"
         to_model_path = (
-            Path(self.config["output_dir"]) / rel_model_path / sub_module_name
+            Path(self.config["output_dir"]) / sub_module_name / rel_model_path
         )
         return to_model_path
 
diff --git a/graph_net/sample_pass/group_ranges_from_subgraph_sources.py b/graph_net/sample_pass/group_ranges_from_subgraph_sources.py
index eaf5be128..0724c59b8 100644
--- a/graph_net/sample_pass/group_ranges_from_subgraph_sources.py
+++ b/graph_net/sample_pass/group_ranges_from_subgraph_sources.py
@@ -83,8 +83,15 @@ def _save_json(
     ):
         model_dir = Path(self.config["output_dir"]) / original_graph_rel_model_path
         model_dir.mkdir(parents=True, exist_ok=True)
-        ranges_json = self._get_ranges_json(subgraph_ranges)
-        paths_json = self._get_paths_json(subgraph_rel_model_paths)
+
+        # Sort ranges by start index, and sort paths accordingly
+        sorted_data = sorted(
+            zip(subgraph_ranges, subgraph_rel_model_paths), key=lambda x: x[0][0]
+        )
+        sorted_ranges, sorted_paths = zip(*sorted_data) if sorted_data else ([], [])
+
+        ranges_json = self._get_ranges_json(list(sorted_ranges))
+        paths_json = self._get_paths_json(list(sorted_paths))
         json_obj = {**ranges_json, **paths_json}
         json_str = json.dumps(json_obj, indent=4)
         (model_dir / self.config["output_json_file_name"]).write_text(json_str)