diff --git a/imperative/python/megengine/functional/vision.py b/imperative/python/megengine/functional/vision.py
index 0fd905ee..7ab6bf24 100644
--- a/imperative/python/megengine/functional/vision.py
+++ b/imperative/python/megengine/functional/vision.py
@@ -420,7 +420,6 @@ def warp_affine(
         Here all available options for params are listed,
         however it does not mean that you can use all the combinations.
         On different platforms, different combinations are supported.
-        ``warp_affine`` only support forward inference, Please refer to ``warp_perspective`` if backward is needed.
     """
     conv_format = _config._get_actual_op_param(format, _config.__conv_format)
 
diff --git a/imperative/python/src/tensor.cpp b/imperative/python/src/tensor.cpp
index f415f572..87f2459d 100644
--- a/imperative/python/src/tensor.cpp
+++ b/imperative/python/src/tensor.cpp
@@ -1074,10 +1074,6 @@ void init_tensor(py::module m) {
             []() {
                 interpreter_for_py->sync();
                 CompNode::sync_all();
-                CompNode::foreach ([](CompNode cn) {
-                    auto err = cn.check_async_error();
-                    mgb_assert(!err, "%s", err->what());
-                });
                 sync_py_task_q();
             },
             py::call_guard<py::gil_scoped_release>());
diff --git a/imperative/src/impl/interpreter/interpreter_impl.cpp b/imperative/src/impl/interpreter/interpreter_impl.cpp
index e8b6fb43..bf122982 100644
--- a/imperative/src/impl/interpreter/interpreter_impl.cpp
+++ b/imperative/src/impl/interpreter/interpreter_impl.cpp
@@ -156,8 +156,6 @@ TensorInfo* ChannelImpl::put_impl(const HostTensorND& value, bool no_cache) {
     if (m_async_level == 0) {
         sync_impl();
         info->desc.comp_node.sync();
-        auto err = info->desc.comp_node.check_async_error();
-        mgb_assert(!err, "%s", err->what());
     }
     return info;
 }
@@ -338,8 +336,6 @@ void ChannelImpl::dispatch_kernel(
         for (auto&& oup : *outputs) {
             auto info = reinterpret_cast<TensorInfo*>(oup);
             info->ptr->comp_node().sync();
-            auto err = info->ptr->comp_node().check_async_error();
-            mgb_assert(!err, "%s", err->what());
         }
     }
 }
@@ -948,8 +944,6 @@ TensorPtr ChannelImpl::wait_tensor(TensorInfo* info, TensorProp prop) {
     });
     MGB_RECORD_EVENT(TensorWaitPropFinishEvent, info->id, m_waitee_id, prop);
     m_waitee = nullptr;
-    auto err = info->ptr->comp_node().check_async_error();
-    mgb_assert(!err, "%s", err->what());
     return info->ptr;
 }