diff --git a/pom.xml b/pom.xml
index 7cb339398..0b2b643d7 100755
--- a/pom.xml
+++ b/pom.xml
@@ -15,7 +15,8 @@
   ~      along with this program.  If not, see <http://www.gnu.org/licenses />.
   -->
 
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 
     <parent>
         <groupId>net.openhft</groupId>
@@ -46,7 +47,7 @@
                 <groupId>net.openhft</groupId>
                 <artifactId>chronicle-bom</artifactId>
                 <type>pom</type>
-                <version>1.12.26</version>
+                <version>1.13.12-SNAPSHOT</version>
                 <scope>import</scope>
             </dependency>
 
diff --git a/src/main/java/net/openhft/chronicle/hash/serialization/impl/SerializationBuilder.java b/src/main/java/net/openhft/chronicle/hash/serialization/impl/SerializationBuilder.java
index 4f8c515ab..adff42e7b 100644
--- a/src/main/java/net/openhft/chronicle/hash/serialization/impl/SerializationBuilder.java
+++ b/src/main/java/net/openhft/chronicle/hash/serialization/impl/SerializationBuilder.java
@@ -26,7 +26,7 @@ import net.openhft.chronicle.values.ValueModel;
 import net.openhft.chronicle.values.Values;
 import net.openhft.chronicle.wire.Marshallable;
 
-import java.io.*;
+import java.io.Externalizable;
 import java.lang.reflect.Modifier;
 import java.nio.ByteBuffer;
 
@@ -35,6 +35,20 @@ import static net.openhft.chronicle.hash.serialization.SizeMarshaller.stopBit;
 
 public final class SerializationBuilder<T> implements Cloneable {
 
+    public final Class<T> tClass;
+    public final boolean sizeIsStaticallyKnown;
+    boolean serializesGeneratedClasses = false;
+    private SizeMarshaller sizeMarshaller = stopBit();
+    private SizedReader<T> reader;
+    private DataAccess<T> dataAccess;
+
+    @SuppressWarnings("unchecked")
+    public SerializationBuilder(Class<T> tClass) {
+        this.tClass = tClass;
+        configureByDefault(tClass);
+        sizeIsStaticallyKnown = constantSizeMarshaller();
+    }
+    
     private static boolean concreteClass(Class c) {
         return !c.isInterface() && !Modifier.isAbstract(c.getModifiers());
     }
@@ -50,22 +64,6 @@ public final class SerializationBuilder<T> implements Cloneable {
         }
     }
 
-    public final Class<T> tClass;
-    private SizeMarshaller sizeMarshaller = stopBit();
-    private SizedReader<T> reader;
-    private DataAccess<T> dataAccess;
-
-    public final boolean sizeIsStaticallyKnown;
-    
-    boolean serializesGeneratedClasses = false;
-
-    @SuppressWarnings("unchecked")
-    public SerializationBuilder(Class<T> tClass) {
-        this.tClass = tClass;
-        configureByDefault(tClass);
-        sizeIsStaticallyKnown = constantSizeMarshaller();
-    }
-
     @SuppressWarnings("unchecked")
     private void configureByDefault(Class<T> tClass) {
         if (tClass.isPrimitive()) {
@@ -98,7 +96,11 @@ public final class SerializationBuilder<T> implements Cloneable {
         if (concreteClass(tClass) && Byteable.class.isAssignableFrom(tClass)) {
             reader(new ByteableSizedReader<>((Class) tClass));
             dataAccess((DataAccess<T>) new ByteableDataAccess<>((Class) tClass));
-            sizeMarshaller(constant(((Byteable) OS.memory().allocateInstance(tClass)).maxSize()));
+            try {
+                sizeMarshaller(constant(((Byteable) OS.memory().allocateInstance(tClass)).maxSize()));
+            } catch (InstantiationException e) {
+                throw new IllegalStateException(e);
+            }
         } else if (tClass == CharSequence.class) {
             reader((SizedReader<T>) CharSequenceSizedReader.INSTANCE);
             dataAccess((DataAccess<T>) new CharSequenceUtf8DataAccess());
diff --git a/src/main/java/net/openhft/chronicle/map/impl/stage/data/ZeroBytesStore.java b/src/main/java/net/openhft/chronicle/map/impl/stage/data/ZeroBytesStore.java
index 3d2bd69a0..1e7afa497 100644
--- a/src/main/java/net/openhft/chronicle/map/impl/stage/data/ZeroBytesStore.java
+++ b/src/main/java/net/openhft/chronicle/map/impl/stage/data/ZeroBytesStore.java
@@ -23,11 +23,27 @@ import net.openhft.chronicle.core.OS;
 import org.jetbrains.annotations.Nullable;
 
 import java.nio.BufferOverflowException;
+import java.nio.BufferUnderflowException;
 import java.nio.ByteBuffer;
 
 public enum ZeroBytesStore implements BytesStore<ZeroBytesStore, Void> {
     INSTANCE;
 
+    @Override
+    public int peekUnsignedByte(long offset) {
+        return 0;
+    }
+
+    @Override
+    public int readVolatileInt(long offset) throws BufferUnderflowException {
+        return 0;
+    }
+
+    @Override
+    public boolean isDirectMemory() {
+        return false;
+    }
+
     @Override
     public byte readByte(long offset) {
         return 0;
@@ -63,11 +79,6 @@ public enum ZeroBytesStore implements BytesStore<ZeroBytesStore, Void> {
         OS.memory().setMemory(address, size, (byte) 0);
     }
 
-    @Override
-    public boolean isNative() {
-        return false;
-    }
-
     @Override
     public boolean sharedMemory() {
         return false;