diff --git a/sf-writer/include/WriterZmqReceiver.hpp b/sf-writer/include/WriterZmqReceiver.hpp
index f9fddfd..ee3cf84 100644
--- a/sf-writer/include/WriterZmqReceiver.hpp
+++ b/sf-writer/include/WriterZmqReceiver.hpp
@@ -23,7 +23,7 @@ public:
     virtual ~WriterZmqReceiver();
 
     void get_next_buffer(
-            const uint64_t pulse_id,
+            const uint64_t start_pulse_id,
             ImageMetadataBuffer* image_metadata,
             char* image_buffer);
 };
diff --git a/sf-writer/src/WriterZmqReceiver.cpp b/sf-writer/src/WriterZmqReceiver.cpp
index c1fdf2d..e562310 100644
--- a/sf-writer/src/WriterZmqReceiver.cpp
+++ b/sf-writer/src/WriterZmqReceiver.cpp
@@ -47,7 +47,7 @@ WriterZmqReceiver::~WriterZmqReceiver()
 }
 
 void WriterZmqReceiver::get_next_buffer(
-        const uint64_t pulse_id,
+        const uint64_t start_pulse_id,
         ImageMetadataBuffer* image_metadata,
         char* image_buffer)
 {
@@ -61,6 +61,8 @@ void WriterZmqReceiver::get_next_buffer(
 
     size_t image_buffer_offset = 0;
 
+    for (size_t pulse_id=start_pulse_id)
+
     for (size_t i_module = 0; i_module < n_modules_; i_module++) {
 
         auto n_bytes_metadata = zmq_recv(
@@ -137,6 +139,4 @@ void WriterZmqReceiver::get_next_buffer(
 
         image_buffer_offset += n_bytes_image;
     }
-
-    image_metadata->data_n_bytes = image_buffer_offset;
 }