private static void ReturnSNError(GXDLMSSettings settings, GXDLMSServer server, Command cmd, ErrorCode error, GXByteBuffer replyData)
{
GXByteBuffer bb = new GXByteBuffer();
bb.SetUInt8(error);
GXDLMS.GetSNPdu(new GXDLMSSNParameters(settings, cmd, 1, (byte)SingleReadResponse.DataAccessError, bb, null), replyData);
settings.ResetBlockIndex();
}