diff --git a/source/adios2/engine/ssc/SscReader.cpp b/source/adios2/engine/ssc/SscReader.cpp
index 9fc4b00c0c..8c20632204 100644
--- a/source/adios2/engine/ssc/SscReader.cpp
+++ b/source/adios2/engine/ssc/SscReader.cpp
@@ -101,7 +101,6 @@ StepStatus SscReader::BeginStep(const StepMode stepMode,
         m_InitialStep = false;
         SyncWritePattern();
         MPI_Win_create(NULL, 0, 1, MPI_INFO_NULL, m_StreamComm, &m_MpiWin);
-        MPI_Win_start(m_MpiAllWritersGroup, 0, m_MpiWin);
     }
     else
     {
@@ -210,7 +209,6 @@ void SscReader::EndStep()
     TAU_SCOPED_TIMER_FUNC();
     if (m_CurrentStep == 0)
     {
-        MPI_Win_complete(m_MpiWin);
         MPI_Win_free(&m_MpiWin);
         SyncReadPattern();
         MPI_Win_create(m_Buffer.data(), m_Buffer.size(), 1, MPI_INFO_NULL,
diff --git a/source/adios2/engine/ssc/SscReader.tcc b/source/adios2/engine/ssc/SscReader.tcc
index 8c0356cee6..d6fb3dcbdc 100644
--- a/source/adios2/engine/ssc/SscReader.tcc
+++ b/source/adios2/engine/ssc/SscReader.tcc
@@ -60,16 +60,13 @@ void SscReader::GetDeferredCommon(Variable<std::string> &variable,
             totalDataSize += i.second.second;
         }
         m_Buffer.resize(totalDataSize);
-        std::vector<MPI_Request> requests;
         for (const auto &i : m_AllReceivingWriterRanks)
         {
-            requests.emplace_back();
-            MPI_Rget(m_Buffer.data() + i.second.first, i.second.second,
-                     MPI_CHAR, i.first, 0, i.second.second, MPI_CHAR, m_MpiWin,
-                     &requests.back());
+            MPI_Win_lock(MPI_LOCK_SHARED, i.first, 0, m_MpiWin);
+            MPI_Get(m_Buffer.data() + i.second.first, i.second.second, MPI_CHAR,
+                    i.first, 0, i.second.second, MPI_CHAR, m_MpiWin);
+            MPI_Win_unlock(i.first, m_MpiWin);
         }
-        MPI_Status statuses[requests.size()];
-        MPI_Waitall(requests.size(), requests.data(), statuses);
     }
 
     for (const auto &i : m_AllReceivingWriterRanks)
@@ -146,16 +143,13 @@ void SscReader::GetDeferredCommon(Variable<T> &variable, T *data)
             totalDataSize += i.second.second;
         }
         m_Buffer.resize(totalDataSize);
-        std::vector<MPI_Request> requests;
         for (const auto &i : m_AllReceivingWriterRanks)
         {
-            requests.emplace_back();
-            MPI_Rget(m_Buffer.data() + i.second.first, i.second.second,
-                     MPI_CHAR, i.first, 0, i.second.second, MPI_CHAR, m_MpiWin,
-                     &requests.back());
+            MPI_Win_lock(MPI_LOCK_SHARED, i.first, 0, m_MpiWin);
+            MPI_Get(m_Buffer.data() + i.second.first, i.second.second, MPI_CHAR,
+                    i.first, 0, i.second.second, MPI_CHAR, m_MpiWin);
+            MPI_Win_unlock(i.first, m_MpiWin);
         }
-        MPI_Status statuses[requests.size()];
-        MPI_Waitall(requests.size(), requests.data(), statuses);
     }
 
     for (const auto &i : m_AllReceivingWriterRanks)
diff --git a/source/adios2/engine/ssc/SscWriter.cpp b/source/adios2/engine/ssc/SscWriter.cpp
index a834392fd3..059c5c1e6d 100644
--- a/source/adios2/engine/ssc/SscWriter.cpp
+++ b/source/adios2/engine/ssc/SscWriter.cpp
@@ -58,13 +58,6 @@ StepStatus SscWriter::BeginStep(StepMode mode, const float timeoutSeconds)
         ++m_CurrentStep;
     }
 
-    if (m_Verbosity >= 5)
-    {
-        std::cout << "SscWriter::BeginStep, World Rank " << m_StreamRank
-                  << ", Writer Rank " << m_WriterRank << ", Step "
-                  << m_CurrentStep << std::endl;
-    }
-
     return StepStatus::OK;
 }
 
@@ -141,8 +134,6 @@ void SscWriter::EndStep()
         SyncWritePattern();
         MPI_Win_create(m_Buffer.data(), m_Buffer.size(), 1, MPI_INFO_NULL,
                        m_StreamComm, &m_MpiWin);
-        MPI_Win_post(m_MpiAllReadersGroup, 0, m_MpiWin);
-        MPI_Win_wait(m_MpiWin);
         MPI_Win_free(&m_MpiWin);
         SyncReadPattern();
         MPI_Win_create(m_Buffer.data(), m_Buffer.size(), 1, MPI_INFO_NULL,