Unable to generate modify/cancel alert in PI Bride from Python code

I am able to fire buy/sell signal to create a order from python code to PI.

However when I do the same thing to fire modify/cancel request there are no alerts generated in PI.Here goes the code for modify

class PiBrdgHeader(Structure):
        _pack_ = 1
        _fields_ = [
        ('_checksum',c_short),
        ('_length',c_short),
        ('_msgType',c_short),
        ('_errorCode',c_int),
        ('_time',c_int)]

class NPiBrdgOrder(Structure):
        _pack_ = 1
        _fields_ = [
        ('_header',PiBrdgHeader),
        ('_exchange', c_char*10),
        ('_trdSymbol', c_char*64),
        ('_piOrderId', c_char*20),
        ('_orderId', c_char*10),
        ('_strategyName', c_char*10),
        ('_side',c_short),
        ('_initQty',c_int),
        ('_disQty',c_int),
        ('_remQty',c_int),
        ('_lPrice',c_double),
        ('_triggerPrice',c_double),
        ('_totTradedValue',c_double),
        ('_lastTradePrice',c_double),
        ('_avgTradePrice',c_double),
        ('_tradedQuantity',c_int),
        ('_lastTradeQuantity',c_int),
        ('_orderType', c_char*12),
        ('_prodTypeStr', c_char*12),
        ('_ClientCode', c_char*12),
        ('_validity', c_char*5),
        ('_orderStatus',c_int),
        ('_entryTime',c_int),
        ('_execTime',c_int)]

def modifyOrder(piOrderId):
        order = NPiBrdgOrder()
        order._header._checksum =  255
        order._header._length = 243
        order._header._msgType = 201
        order._header._time = 0
        order._piOrderId=piOrderId
        order._piOrderId.ljust(20,'\0')

        order._initQty = 1 #  ( should be in lots)
        order._disQty = 1 # 
        order._remQty = 1 # 
        order._lPrice = 100 # price in INR
        order._triggerPrice = 10
        
        order._orderStatus = 0
        order._entryTime = 0
        order._execTime = 0
        return order

def SendPktToServerOverTcpForModify(order):
        packed_data = ctypes.create_string_buffer(243)  
        struct.pack_into('h',packed_data,0,order._header._checksum)
        struct.pack_into('h',packed_data,2,order._header._length)
        struct.pack_into('h',packed_data,4,order._header._msgType)
        struct.pack_into('I',packed_data,6,order._header._errorCode)
        struct.pack_into('I',packed_data,10,order._header._time)
        struct.pack_into('20s',packed_data,88,order._piOrderId)
        
        print >>sys.stderr, 'sending "%s"' % binascii.hexlify(packed_data)
        _clientSocket.sendall(packed_data)

order=modifyOrder("160109000000484")
response=SendPktToServerOverTcpForModify(order)

Where exactly am I going wrong can anyone point out?

Also since this alert is triggered by PI-id,would I be able to modify cover order by this?

Thanks 

are you using pi bridge?

Trying to use…hence stuck :frowning: