For a Udp connection, while loop does not work. Code gives no error.

I am extratcing data from a file and receiving it on matlab via udp connection. I have written doen a code which works perfectly fine when I run it step by step. BUt when I run it as a whole while loop doesn't seem to work. Here is the code:

port=50021;
    smartmeter = smartHES(port); 
    smartmeter.InitiateSocket();  
    dataAmount=0;
    dataHistory=[];
    pause(0.1)
    byteav=smartmeter.smart.BytesAvailable;
    while byteav    
        [smt]=smartmeter.readDATA();
        dataHistory=[dataHistory smt];
        fprintf('data is being read on port %d amount now %d\n',port,dataAmount);
        
    end

What should I do to get this code running by just pressing run button. Further I will use this code for several ports using spmd.

[Walter Roberson]

you do not update, byteav in your loop, or dataAmount

[Asma Farooq]

 Ports=[50021,50661];
 n=2;
parpool('local',2,'AttachedFiles',{'smartHES.m'})
 port = Composite(n);
 for i=1:2
   port{i}=Ports(i); 
 end
 dataAmount=0;
 dataHistory=[];
 spmd
   smartmeter = smartHES(port); 
  smartmeter.InitiateSocket();  
 byteav=smartmeter.smart.BytesAvailable;
  while byteav
         [smt]=smartmeter.readDATA();
       dataHistory=[dataHistory smt];
    fprintf('data is being read on port %d amount now %d\n',port,dataAmount);
          dataAmount= dataAmount+1;
        if byteav==0
             disp('no data available to be read')  
        end
        completedata = dataHistory;
    end
        
  smartmeter.NetworkDispose();
 end
 
 

[Asma Farooq]

I tried the above code but still it does not work. Even if I don't use spmd, and run only for 1 loop, I have to run it section by section then it starts running and I have to stop it manually.

[Walter Roberson]

you still do not update byteav

[Asma Farooq]

I got it now. Thank you.