// Status
        SMBUtil.writeInt4(0, buffer, headerStart + 8);
        // Command (READ = 0x0008)
        SMBUtil.writeInt2(0x0008, buffer, headerStart + 12);
        // Credit request/response
        SMBUtil.writeInt2(1, buffer, headerStart + 14);
        // Flags
        SMBUtil.writeInt4(0, buffer, headerStart + 16);
        // Next command
        SMBUtil.writeInt4(0, buffer, headerStart + 20);

        } else {

            /*
             * Set bufferIndex according to andxOffset
             */

            bufferIndex = this.headerStart + this.andxOffset;

            this.andx.headerStart = this.headerStart;
            this.andx.setCommand(this.andxCommand);
            this.andx.setErrorCode(getErrorCode());
            this.andx.setFlags(getFlags());

        return this.errorContextCount;
    }

    /**
     * Gets the header start position for this message.
     *
     * @return the headerStart
     */
    public final int getHeaderStart() {
        return this.headerStart;
    }

    /**
     * Gets the total length of this message.
     *
     * @return the length
     */
    public final int getLength() {

    private void setHeaderStart(Smb2ChangeNotifyResponse response, int headerStart) throws Exception {
        Method method = ServerMessageBlock2.class.getDeclaredMethod("getHeaderStart");
        method.setAccessible(true);

        Field field = ServerMessageBlock2.class.getDeclaredField("headerStart");
        field.setAccessible(true);
        field.setInt(response, headerStart);
    }

    /**