diff --git a/of-save/lib/gen-src/main/java/org/projectfloodlight/openflow/protocol/ver12/OFGroupModFailedErrorMsgVer12.java b/of-save/lib/gen-src/main/java/org/projectfloodlight/openflow/protocol/ver12/OFGroupModFailedErrorMsgVer12.java
new file mode 100644
index 0000000..eb59186
--- /dev/null
+++ b/of-save/lib/gen-src/main/java/org/projectfloodlight/openflow/protocol/ver12/OFGroupModFailedErrorMsgVer12.java
@@ -0,0 +1,400 @@
+// Copyright (c) 2008 The Board of Trustees of The Leland Stanford Junior University
+// Copyright (c) 2011, 2012 Open Networking Foundation
+// Copyright (c) 2012, 2013 Big Switch Networks, Inc.
+// This library was generated by the LoxiGen Compiler.
+// See the file LICENSE.txt which should have been included in the source distribution
+
+// Automatically generated by LOXI from template of_class.java
+// Do not modify
+
+package org.projectfloodlight.openflow.protocol.ver12;
+
+import org.projectfloodlight.openflow.protocol.*;
+import org.projectfloodlight.openflow.protocol.action.*;
+import org.projectfloodlight.openflow.protocol.actionid.*;
+import org.projectfloodlight.openflow.protocol.bsntlv.*;
+import org.projectfloodlight.openflow.protocol.errormsg.*;
+import org.projectfloodlight.openflow.protocol.meterband.*;
+import org.projectfloodlight.openflow.protocol.instruction.*;
+import org.projectfloodlight.openflow.protocol.instructionid.*;
+import org.projectfloodlight.openflow.protocol.match.*;
+import org.projectfloodlight.openflow.protocol.oxm.*;
+import org.projectfloodlight.openflow.protocol.queueprop.*;
+import org.projectfloodlight.openflow.types.*;
+import org.projectfloodlight.openflow.util.*;
+import org.projectfloodlight.openflow.exceptions.*;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import java.util.Set;
+import org.jboss.netty.buffer.ChannelBuffer;
+import com.google.common.hash.PrimitiveSink;
+import com.google.common.hash.Funnel;
+
+class OFGroupModFailedErrorMsgVer12 implements OFGroupModFailedErrorMsg {
+    private static final Logger logger = LoggerFactory.getLogger(OFGroupModFailedErrorMsgVer12.class);
+    // version: 1.2
+    final static byte WIRE_VERSION = 3;
+    final static int MINIMUM_LENGTH = 12;
+
+        private final static long DEFAULT_XID = 0x0L;
+        private final static OFErrorCauseData DEFAULT_DATA = OFErrorCauseData.NONE;
+
+    // OF message fields
+    private final long xid;
+    private final OFGroupModFailedCode code;
+    private final OFErrorCauseData data;
+//
+
+    // package private constructor - used by readers, builders, and factory
+    OFGroupModFailedErrorMsgVer12(long xid, OFGroupModFailedCode code, OFErrorCauseData data) {
+        this.xid = xid;
+        this.code = code;
+        this.data = data;
+    }
+
+    // Accessors for OF message fields
+    @Override
+    public OFVersion getVersion() {
+        return OFVersion.OF_12;
+    }
+
+    @Override
+    public OFType getType() {
+        return OFType.ERROR;
+    }
+
+    @Override
+    public long getXid() {
+        return xid;
+    }
+
+    @Override
+    public OFErrorType getErrType() {
+        return OFErrorType.GROUP_MOD_FAILED;
+    }
+
+    @Override
+    public OFGroupModFailedCode getCode() {
+        return code;
+    }
+
+    @Override
+    public OFErrorCauseData getData() {
+        return data;
+    }
+
+
+
+    public OFGroupModFailedErrorMsg.Builder createBuilder() {
+        return new BuilderWithParent(this);
+    }
+
+    static class BuilderWithParent implements OFGroupModFailedErrorMsg.Builder {
+        final OFGroupModFailedErrorMsgVer12 parentMessage;
+
+        // OF message fields
+        private boolean xidSet;
+        private long xid;
+        private boolean codeSet;
+        private OFGroupModFailedCode code;
+        private boolean dataSet;
+        private OFErrorCauseData data;
+
+        BuilderWithParent(OFGroupModFailedErrorMsgVer12 parentMessage) {
+            this.parentMessage = parentMessage;
+        }
+
+    @Override
+    public OFVersion getVersion() {
+        return OFVersion.OF_12;
+    }
+
+    @Override
+    public OFType getType() {
+        return OFType.ERROR;
+    }
+
+    @Override
+    public long getXid() {
+        return xid;
+    }
+
+    @Override
+    public OFGroupModFailedErrorMsg.Builder setXid(long xid) {
+        this.xid = xid;
+        this.xidSet = true;
+        return this;
+    }
+    @Override
+    public OFErrorType getErrType() {
+        return OFErrorType.GROUP_MOD_FAILED;
+    }
+
+    @Override
+    public OFGroupModFailedCode getCode() {
+        return code;
+    }
+
+    @Override
+    public OFGroupModFailedErrorMsg.Builder setCode(OFGroupModFailedCode code) {
+        this.code = code;
+        this.codeSet = true;
+        return this;
+    }
+    @Override
+    public OFErrorCauseData getData() {
+        return data;
+    }
+
+    @Override
+    public OFGroupModFailedErrorMsg.Builder setData(OFErrorCauseData data) {
+        this.data = data;
+        this.dataSet = true;
+        return this;
+    }
+
+
+        @Override
+        public OFGroupModFailedErrorMsg build() {
+                long xid = this.xidSet ? this.xid : parentMessage.xid;
+                OFGroupModFailedCode code = this.codeSet ? this.code : parentMessage.code;
+                if(code == null)
+                    throw new NullPointerException("Property code must not be null");
+                OFErrorCauseData data = this.dataSet ? this.data : parentMessage.data;
+                if(data == null)
+                    throw new NullPointerException("Property data must not be null");
+
+                //
+                return new OFGroupModFailedErrorMsgVer12(
+                    xid,
+                    code,
+                    data
+                );
+        }
+
+    }
+
+    static class Builder implements OFGroupModFailedErrorMsg.Builder {
+        // OF message fields
+        private boolean xidSet;
+        private long xid;
+        private boolean codeSet;
+        private OFGroupModFailedCode code;
+        private boolean dataSet;
+        private OFErrorCauseData data;
+
+    @Override
+    public OFVersion getVersion() {
+        return OFVersion.OF_12;
+    }
+
+    @Override
+    public OFType getType() {
+        return OFType.ERROR;
+    }
+
+    @Override
+    public long getXid() {
+        return xid;
+    }
+
+    @Override
+    public OFGroupModFailedErrorMsg.Builder setXid(long xid) {
+        this.xid = xid;
+        this.xidSet = true;
+        return this;
+    }
+    @Override
+    public OFErrorType getErrType() {
+        return OFErrorType.GROUP_MOD_FAILED;
+    }
+
+    @Override
+    public OFGroupModFailedCode getCode() {
+        return code;
+    }
+
+    @Override
+    public OFGroupModFailedErrorMsg.Builder setCode(OFGroupModFailedCode code) {
+        this.code = code;
+        this.codeSet = true;
+        return this;
+    }
+    @Override
+    public OFErrorCauseData getData() {
+        return data;
+    }
+
+    @Override
+    public OFGroupModFailedErrorMsg.Builder setData(OFErrorCauseData data) {
+        this.data = data;
+        this.dataSet = true;
+        return this;
+    }
+//
+        @Override
+        public OFGroupModFailedErrorMsg build() {
+            long xid = this.xidSet ? this.xid : DEFAULT_XID;
+            if(!this.codeSet)
+                throw new IllegalStateException("Property code doesn't have default value -- must be set");
+            if(code == null)
+                throw new NullPointerException("Property code must not be null");
+            OFErrorCauseData data = this.dataSet ? this.data : DEFAULT_DATA;
+            if(data == null)
+                throw new NullPointerException("Property data must not be null");
+
+
+            return new OFGroupModFailedErrorMsgVer12(
+                    xid,
+                    code,
+                    data
+                );
+        }
+
+    }
+
+
+    final static Reader READER = new Reader();
+    static class Reader implements OFMessageReader<OFGroupModFailedErrorMsg> {
+        @Override
+        public OFGroupModFailedErrorMsg readFrom(ChannelBuffer bb) throws OFParseError {
+            int start = bb.readerIndex();
+            // fixed value property version == 3
+            byte version = bb.readByte();
+            if(version != (byte) 0x3)
+                throw new OFParseError("Wrong version: Expected=OFVersion.OF_12(3), got="+version);
+            // fixed value property type == 1
+            byte type = bb.readByte();
+            if(type != (byte) 0x1)
+                throw new OFParseError("Wrong type: Expected=OFType.ERROR(1), got="+type);
+            int length = U16.f(bb.readShort());
+            if(length < MINIMUM_LENGTH)
+                throw new OFParseError("Wrong length: Expected to be >= " + MINIMUM_LENGTH + ", was: " + length);
+            if(bb.readableBytes() + (bb.readerIndex() - start) < length) {
+                // Buffer does not have all data yet
+                bb.readerIndex(start);
+                return null;
+            }
+            if(logger.isTraceEnabled())
+                logger.trace("readFrom - length={}", length);
+            long xid = U32.f(bb.readInt());
+            // fixed value property errType == 6
+            short errType = bb.readShort();
+            if(errType != (short) 0x6)
+                throw new OFParseError("Wrong errType: Expected=OFErrorType.GROUP_MOD_FAILED(6), got="+errType);
+            OFGroupModFailedCode code = OFGroupModFailedCodeSerializerVer12.readFrom(bb);
+            OFErrorCauseData data = OFErrorCauseData.read(bb, length - (bb.readerIndex() - start), OFVersion.OF_12);
+
+            OFGroupModFailedErrorMsgVer12 groupModFailedErrorMsgVer12 = new OFGroupModFailedErrorMsgVer12(
+                    xid,
+                      code,
+                      data
+                    );
+            if(logger.isTraceEnabled())
+                logger.trace("readFrom - read={}", groupModFailedErrorMsgVer12);
+            return groupModFailedErrorMsgVer12;
+        }
+    }
+
+    public void putTo(PrimitiveSink sink) {
+        FUNNEL.funnel(this, sink);
+    }
+
+    final static OFGroupModFailedErrorMsgVer12Funnel FUNNEL = new OFGroupModFailedErrorMsgVer12Funnel();
+    static class OFGroupModFailedErrorMsgVer12Funnel implements Funnel<OFGroupModFailedErrorMsgVer12> {
+        private static final long serialVersionUID = 1L;
+        @Override
+        public void funnel(OFGroupModFailedErrorMsgVer12 message, PrimitiveSink sink) {
+            // fixed value property version = 3
+            sink.putByte((byte) 0x3);
+            // fixed value property type = 1
+            sink.putByte((byte) 0x1);
+            // FIXME: skip funnel of length
+            sink.putLong(message.xid);
+            // fixed value property errType = 6
+            sink.putShort((short) 0x6);
+            OFGroupModFailedCodeSerializerVer12.putTo(message.code, sink);
+            message.data.putTo(sink);
+        }
+    }
+
+
+    public void writeTo(ChannelBuffer bb) {
+        WRITER.write(bb, this);
+    }
+
+    final static Writer WRITER = new Writer();
+    static class Writer implements OFMessageWriter<OFGroupModFailedErrorMsgVer12> {
+        @Override
+        public void write(ChannelBuffer bb, OFGroupModFailedErrorMsgVer12 message) {
+            int startIndex = bb.writerIndex();
+            // fixed value property version = 3
+            bb.writeByte((byte) 0x3);
+            // fixed value property type = 1
+            bb.writeByte((byte) 0x1);
+            // length is length of variable message, will be updated at the end
+            int lengthIndex = bb.writerIndex();
+            bb.writeShort(U16.t(0));
+
+            bb.writeInt(U32.t(message.xid));
+            // fixed value property errType = 6
+            bb.writeShort((short) 0x6);
+            OFGroupModFailedCodeSerializerVer12.writeTo(bb, message.code);
+            message.data.writeTo(bb);
+
+            // update length field
+            int length = bb.writerIndex() - startIndex;
+            bb.setShort(lengthIndex, length);
+
+        }
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder b = new StringBuilder("OFGroupModFailedErrorMsgVer12(");
+        b.append("xid=").append(xid);
+        b.append(", ");
+        b.append("code=").append(code);
+        b.append(", ");
+        b.append("data=").append(data);
+        b.append(")");
+        return b.toString();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        OFGroupModFailedErrorMsgVer12 other = (OFGroupModFailedErrorMsgVer12) obj;
+
+        if( xid != other.xid)
+            return false;
+        if (code == null) {
+            if (other.code != null)
+                return false;
+        } else if (!code.equals(other.code))
+            return false;
+        if (data == null) {
+            if (other.data != null)
+                return false;
+        } else if (!data.equals(other.data))
+            return false;
+        return true;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+
+        result = prime *  (int) (xid ^ (xid >>> 32));
+        result = prime * result + ((code == null) ? 0 : code.hashCode());
+        result = prime * result + ((data == null) ? 0 : data.hashCode());
+        return result;
+    }
+
+}