diff --git a/paddle/operators/CMakeLists.txt b/paddle/operators/CMakeLists.txt
index 5085e1b92555eebd1c5a7af9bf9af99bc6c90333..9d28404f687dca0e36ee24d4712bbae82d60d620 100644
--- a/paddle/operators/CMakeLists.txt
+++ b/paddle/operators/CMakeLists.txt
@@ -55,7 +55,5 @@ op_library(fc_op SRCS fc_op.cc DEPS mul_op rowwise_add_op sigmoid_op
 
 op_library(sgd_op SRCS sgd_op.cc sgd_op.cu)
 
-op_library(recurrent_network_op SRCS recurrent_network_op.cc DEPS op_desc
-tensor op_registry operator net)
-cc_test(recurrent_network_op_test SRCS recurrent_network_op_test.cc DEPS
-recurrent_network_op gtest mul_op add_op)
+op_library(recurrent_op SRCS recurrent_op.cc DEPS op_desc tensor op_registry operator net)
+cc_test(recurrent_op_test SRCS recurrent_op_test.cc DEPS recurrent_op gtest mul_op add_op)
diff --git a/paddle/operators/recurrent_network_op.cc b/paddle/operators/recurrent_op.cc
similarity index 97%
rename from paddle/operators/recurrent_network_op.cc
rename to paddle/operators/recurrent_op.cc
index dcb1ac19d2cb197bb54783e90c891fbd98c99e1a..b3132c2020d332b2d70d3f642d5cd75fb42f2316 100644
--- a/paddle/operators/recurrent_network_op.cc
+++ b/paddle/operators/recurrent_op.cc
@@ -12,7 +12,7 @@
    See the License for the specific language governing permissions and
    limitations under the License. */
 
-#include "paddle/operators/recurrent_network_op.h"
+#include "paddle/operators/recurrent_op.h"
 
 #include <glog/logging.h>
 #include <cstring>
@@ -108,8 +108,13 @@ void LinkMemories(std::vector<std::shared_ptr<Scope>>& scopes,
   std::shared_ptr<Scope> scope = scopes[step_id];
   std::shared_ptr<Scope> linked_scope = scopes[step_id + offset];
   for (auto& attr : memories) {
+    PADDLE_ENFORCE(scope->HasVariable(attr.pre_var),
+                   "the pre-memory [%s] is not in scope.",
+                   attr.pre_var);
+    PADDLE_ENFORCE(linked_scope->HasVariable(attr.var),
+                   "the memory [%s] is not in linked scope.",
+                   attr.var);
     auto mem = scope->GetVariable(attr.pre_var)->GetMutable<Tensor>();
-    // maybe share variable is better?
     auto linked_mem = linked_scope->GetVariable(attr.var)->GetMutable<Tensor>();
     if (infer_shape_mode) {
       mem->Resize(linked_mem->dims());
@@ -295,12 +300,12 @@ public:
     const auto& name = RecurrentOp::kArgName;
     // inputs and outputs stored in proto
     AddInputs(name.inlinks,
-              "the input that need to be segmented for each step.");
+              "the inputs that need to be segmented for each step.");
     AddInputs(name.boot_memories, "variables to initialize memories.");
     AddInput(name.step_net, "network shared by all steps.");
 
     AddOutputs(name.outlinks,
-               "the output that need to concated for all steps.");
+               "the outputs that need to concated for all steps.");
     AddOutput(name.step_scopes, "step scopes");
 
     // Attributes stored in AttributeMap
diff --git a/paddle/operators/recurrent_network_op.h b/paddle/operators/recurrent_op.h
similarity index 100%
rename from paddle/operators/recurrent_network_op.h
rename to paddle/operators/recurrent_op.h
diff --git a/paddle/operators/recurrent_network_op_test.cc b/paddle/operators/recurrent_op_test.cc
similarity index 99%
rename from paddle/operators/recurrent_network_op_test.cc
rename to paddle/operators/recurrent_op_test.cc
index 635c2fe0381679bb08965317f69721909bd25157..4bff8a0ed633522fcd83f865586a557e824312b7 100644
--- a/paddle/operators/recurrent_network_op_test.cc
+++ b/paddle/operators/recurrent_op_test.cc
@@ -18,7 +18,7 @@
 #include "paddle/framework/op_registry.h"
 #include "paddle/framework/operator.h"
 #include "paddle/framework/tensor.h"
-#include "paddle/operators/recurrent_network_op.h"
+#include "paddle/operators/recurrent_op.h"
 
 namespace paddle {
 namespace operators {
diff --git a/paddle/pybind/CMakeLists.txt b/paddle/pybind/CMakeLists.txt
index 7d0e68a8f30de609b870c81c3bdb7aee090f15d3..43d8e17ec1c94aaccd2c7f392218dfad54d3c632 100644
--- a/paddle/pybind/CMakeLists.txt
+++ b/paddle/pybind/CMakeLists.txt
@@ -1,2 +1,2 @@
 cc_library(paddle_pybind SHARED SRCS pybind.cc DEPS pybind python
-        add_op fc_op sgd_op cross_entropy_op recurrent_network_op)
+        add_op fc_op sgd_op cross_entropy_op recurrent_op)