diff --git a/src/main/java/net/openhft/chronicle/map/VanillaChronicleMap.java b/src/main/java/net/openhft/chronicle/map/VanillaChronicleMap.java
index f20666cb5..8b7bd8f48 100755
--- a/src/main/java/net/openhft/chronicle/map/VanillaChronicleMap.java
+++ b/src/main/java/net/openhft/chronicle/map/VanillaChronicleMap.java
@@ -728,16 +728,16 @@ class VanillaChronicleMap<K, KI, MKI extends MetaBytesInterop<K, ? super KI>,
         try {
             return isKey ? DataValueClasses.newInstance(aClass) :
                     DataValueClasses.newDirectInstance(aClass);
-        } catch (Exception e) {
-            if (aClass.isInterface()) {
 
+        } catch (Exception e) {
+            if (e.getCause() instanceof IllegalStateException)
+                throw e;
+
+            if (aClass.isInterface())
                 throw new IllegalStateException("It not possible to create a instance from " +
                         "interface=" + aClass.getSimpleName() + " we recommend you create an " +
                         "instance in the usual way.", e);
 
-
-            }
-
             try {
                 return (T) aClass.newInstance();
             } catch (Exception e1) {
diff --git a/src/test/java/net/openhft/chronicle/map/CHMUseCasesTest.java b/src/test/java/net/openhft/chronicle/map/CHMUseCasesTest.java
index a2c49df11..47bd3dae7 100644
--- a/src/test/java/net/openhft/chronicle/map/CHMUseCasesTest.java
+++ b/src/test/java/net/openhft/chronicle/map/CHMUseCasesTest.java
@@ -4,6 +4,7 @@ import com.google.common.primitives.Chars;
 import net.openhft.chronicle.hash.replication.TcpTransportAndNetworkConfig;
 import net.openhft.lang.io.ByteBufferBytes;
 import net.openhft.lang.io.serialization.impl.*;
+import net.openhft.lang.model.constraints.MaxSize;
 import net.openhft.lang.model.constraints.NotNull;
 import net.openhft.lang.values.*;
 import org.junit.After;
@@ -2437,6 +2438,35 @@ public class CHMUseCasesTest {
         }
         return ret;
     }
+
+    @Ignore("HCOLL-271 JSON<->Map fails for data generated inner classes")
+    @Test
+    public void testGeneratedDataValue() throws IOException {
+
+        if (typeOfMap == TypeOfMap.STATELESS)
+            return; // acquireUsingLocked not supported by the STATELESS client
+
+        ChronicleMapBuilder<String, IBean> builder = ChronicleMapBuilder
+                .of(String.class, IBean.class).keySize(5);
+        try (ChronicleMap<String, IBean> map = newInstance(builder)) {
+
+            IBean iBean = map.newValueInstance();
+            try (WriteContext cx = map.acquireUsingLocked("1",
+                    iBean)) {
+                iBean.setDouble(1.2);
+                iBean.setLong(2);
+                iBean.setInt(4);
+                IBean.Inner innerAt = iBean.getInnerAt(1);
+                innerAt.setMessage("Hello world");
+            }
+
+            assertEquals(2, map.get("1").getLong());
+            assertEquals("Hello world", map.get("1").getInnerAt(1).getMessage());
+            mapChecks();
+        }
+    }
+
+
 }
 
 enum ToString implements Function<Object, String> {
@@ -2448,7 +2478,7 @@ enum ToString implements Function<Object, String> {
     }
 
 }
-/*
+
 interface IBean {
     long getLong();
 
@@ -2461,5 +2491,19 @@ interface IBean {
     int getInt();
 
     void setInt(int i);
+
+    void setInnerAt(@MaxSize(7) int index, Inner inner);
+
+    Inner getInnerAt(int index);
+
+    /* nested interface - empowering an Off-Heap hierarchical “TIER of prices”
+    as array[ ] value */
+    interface Inner {
+
+        String getMessage();
+
+        void setMessage(@MaxSize(20) String px);
+
+    }
 }
-*/
+