diff --git a/src/main/java/net/openhft/chronicle/map/AbstractChannelReplicator.java b/src/main/java/net/openhft/chronicle/map/AbstractChannelReplicator.java
index 37b6b2e93..80267adbf 100644
--- a/src/main/java/net/openhft/chronicle/map/AbstractChannelReplicator.java
+++ b/src/main/java/net/openhft/chronicle/map/AbstractChannelReplicator.java
@@ -53,6 +53,7 @@ abstract class AbstractChannelReplicator implements Closeable {
 
     public static final int SIZE_OF_SIZE = 4;
     public static final int SIZE_OF_TRANSACTION_ID = 8;
+    public static final int SIZE_OF_IS_EXCEPTION = 1;
 
     private static final Logger LOG = LoggerFactory.getLogger(AbstractChannelReplicator.class);
 
diff --git a/src/main/java/net/openhft/chronicle/map/StatelessChronicleMap.java b/src/main/java/net/openhft/chronicle/map/StatelessChronicleMap.java
index 2c88efaff..789169a58 100644
--- a/src/main/java/net/openhft/chronicle/map/StatelessChronicleMap.java
+++ b/src/main/java/net/openhft/chronicle/map/StatelessChronicleMap.java
@@ -982,8 +982,9 @@ class StatelessChronicleMap<K, V> implements ChronicleMap<K, V>, Closeable, Clon
         // block until we have received all the bytes in this chunk
         receive(size, timeoutTime);
 
-        final boolean isException = bytes.readBoolean();
+
         final long inTransactionId = bytes.readLong();
+        final boolean isException = bytes.readBoolean();
 
         if (inTransactionId != transactionId) {
             LOG.error("", new IllegalStateException("Skipped Message with transaction-id=" +
diff --git a/src/main/java/net/openhft/chronicle/map/TcpReplicator.java b/src/main/java/net/openhft/chronicle/map/TcpReplicator.java
index cd24a9757..9d78cb591 100644
--- a/src/main/java/net/openhft/chronicle/map/TcpReplicator.java
+++ b/src/main/java/net/openhft/chronicle/map/TcpReplicator.java
@@ -1520,7 +1520,7 @@ class StatelessServerConnector<K, V> {
 
         writeException(writer, e);
 
-        writeSizeAndFlags(sizeLocation, true, writer);
+        writeSizeAndFlags(sizeLocation+SIZE_OF_TRANSACTION_ID, true, writer);
         return null;
     }
 
@@ -1845,17 +1845,19 @@ class StatelessServerConnector<K, V> {
     }
 
     private long reflectTransactionId(Bytes reader, Bytes writer) {
-        final long sizeLocation = writer.position();
-        writer.skip(TRANSACTION_ID_OFFSET); // isException +  SIZE_OF_SIZE
         final long transactionId = reader.readLong();
+        final long sizeLocation = writer.position();
+        writer.skip(SIZE_OF_SIZE);
         writer.writeLong(transactionId);
+        writer.writeBoolean(false); // isException
         return sizeLocation;
     }
 
     private void writeSizeAndFlags(long locationOfSize, boolean isException, Bytes out) {
         final long size = out.position() - locationOfSize;
         out.writeInt(locationOfSize, (int) size); // size
-        out.writeBoolean(locationOfSize + SIZE_OF_SIZE, isException); // isException
+        out.skip(SIZE_OF_TRANSACTION_ID);
+        out.writeBoolean(isException); // isException
     }
 
     private void writeException(Bytes out, Throwable e) {
@@ -1887,10 +1889,11 @@ class StatelessServerConnector<K, V> {
     private long header(Bytes writer, final long transactionId) {
         final long sizeLocation = writer.position();
 
-        writer.skip(TRANSACTION_ID_OFFSET);
+        writer.skip(SIZE_OF_SIZE);
+        writer.writeLong(transactionId);
 
         // exception
-        writer.writeLong(transactionId);
+        writer.skip(1);
 
         //  hasAnotherChunk
         writer.skip(1);
@@ -1909,12 +1912,12 @@ class StatelessServerConnector<K, V> {
         // size in bytes
         writer.writeInt(size);
 
-        // is exception
-        writer.writeBoolean(false);
-
         //transaction id;
         writer.skip(8);
 
+        // is exception
+        writer.writeBoolean(false);
+
         writer.writeBoolean(hasAnotherChunk);
 
         // count