diff --git a/source/api_cc/include/DeepPot.h b/source/api_cc/include/DeepPot.h
index 1c252938f6..0e61b03ce9 100644
--- a/source/api_cc/include/DeepPot.h
+++ b/source/api_cc/include/DeepPot.h
@@ -480,7 +480,7 @@ class DeepPotModelDevi {
    **/
   double cutoff() const {
     assert(inited);
-    return rcut;
+    return dps[0].cutoff();
   };
   /**
    * @brief Get the number of types.
@@ -488,7 +488,7 @@ class DeepPotModelDevi {
    **/
   int numb_types() const {
     assert(inited);
-    return ntypes;
+    return dps[0].numb_types();
   };
   /**
    * @brief Get the number of types with spin.
@@ -496,7 +496,7 @@ class DeepPotModelDevi {
    **/
   int numb_types_spin() const {
     assert(inited);
-    return ntypes_spin;
+    return dps[0].numb_types_spin();
   };
   /**
    * @brief Get the dimension of the frame parameter.
@@ -504,7 +504,7 @@ class DeepPotModelDevi {
    **/
   int dim_fparam() const {
     assert(inited);
-    return dfparam;
+    return dps[0].dim_fparam();
   };
   /**
    * @brief Get the dimension of the atomic parameter.
@@ -512,7 +512,7 @@ class DeepPotModelDevi {
    **/
   int dim_aparam() const {
     assert(inited);
-    return daparam;
+    return dps[0].dim_aparam();
   };
   /**
    * @brief Compute the average energy.
@@ -590,7 +590,7 @@ class DeepPotModelDevi {
    **/
   bool is_aparam_nall() const {
     assert(inited);
-    return aparam_nall;
+    return dps[0].is_aparam_nall();
   };
 
  private:
diff --git a/source/api_cc/src/DeepPot.cc b/source/api_cc/src/DeepPot.cc
index 5f379a7693..528fe33f16 100644
--- a/source/api_cc/src/DeepPot.cc
+++ b/source/api_cc/src/DeepPot.cc
@@ -1242,22 +1242,10 @@ DeepPotModelDevi::DeepPotModelDevi(
     const int& gpu_rank,
     const std::vector<std::string>& file_contents)
     : inited(false), init_nbor(false), numb_models(0) {
-  try {
-    init(models, gpu_rank, file_contents);
-  } catch (...) {
-    // Clean up and rethrow, as the destructor will not be called
-    for (unsigned ii = 0; ii < numb_models; ++ii) {
-      delete graph_defs[ii];
-    }
-    throw;
-  }
+  init(models, gpu_rank, file_contents);
 }
 
-DeepPotModelDevi::~DeepPotModelDevi() {
-  for (unsigned ii = 0; ii < numb_models; ++ii) {
-    delete graph_defs[ii];
-  }
-}
+DeepPotModelDevi::~DeepPotModelDevi() {}
 
 void DeepPotModelDevi::init(const std::vector<std::string>& models,
                             const int& gpu_rank,
@@ -1269,6 +1257,9 @@ void DeepPotModelDevi::init(const std::vector<std::string>& models,
     return;
   }
   numb_models = models.size();
+  if (numb_models == 0) {
+    throw deepmd::deepmd_exception("no model is specified");
+  }
   for (unsigned int ii = 0; ii < numb_models; ++ii) {
     dps[ii] = DeepPot(models[ii], gpu_rank, file_contents[ii]);
   }