diff --git a/network_process/src/process.cpp b/network_process/src/process.cpp
index 8c9aeab..22c6845 100644
--- a/network_process/src/process.cpp
+++ b/network_process/src/process.cpp
@@ -124,10 +124,10 @@ ISNP_API void build_implicit_network_by_blobtree(const s_settings&
                                   shell_links);
                 compute_arrangement_cells(static_cast<uint32_t>(shells.size()), shell_links, arrangement_cells);
             }
-            shell_to_cell.resize(shells.size());
-            for (uint32_t i = 0; i < arrangement_cells.size(); i++) {
-                for (auto shell : arrangement_cells[i]) shell_to_cell[shell] = i;
-            }
+        }
+        shell_to_cell.resize(shells.size());
+        for (uint32_t i = 0; i < arrangement_cells.size(); i++) {
+            for (auto shell : arrangement_cells[i]) shell_to_cell[shell] = i;
         }
         // post process
         {