diff --git a/qwen3_6_scripts/paged_attn.py b/qwen3_6_scripts/paged_attn.py
index 91e83b37..23118933 100644
--- a/qwen3_6_scripts/paged_attn.py
+++ b/qwen3_6_scripts/paged_attn.py
@@ -2292,5 +2292,8 @@ class PagedAttention:
     ) -> None:
         key_caches = [kv_cache[0] for kv_cache in kv_caches]
         value_caches = [kv_cache[1] for kv_cache in kv_caches]
-        ops.copy_blocks(key_caches, value_caches, src_to_dists)
-        
\ No newline at end of file
+        # BI100 CoreX 3.2.3: ixformer exposes vllm_copy_blocks, not
+        # copy_blocks.  Call the vendor symbol directly instead of going
+        # through ops.copy_blocks (which hits the missing name).
+        import ixformer.functions as _ixf
+        _ixf.vllm_copy_blocks(key_caches, value_caches, src_to_dists)
\ No newline at end of file
diff --git a/qwen3_6_scripts/patch_corex_swap_blocks.py b/qwen3_6_scripts/patch_corex_swap_blocks.py
index 0988bffd..03f9471a 100644
--- a/qwen3_6_scripts/patch_corex_swap_blocks.py
+++ b/qwen3_6_scripts/patch_corex_swap_blocks.py
@@ -62,4 +62,4 @@ replace_once(
     COMPATIBLE_BLOCK,
     required=True,
     already_contains="BI100 CoreX 3.2.3 exposes vllm_swap_blocks",
-)
+)
\ No newline at end of file