Not sure where to go with this.

I'm sending 3 bytes of data  at 38400 baud every 500 ms. If I speed up the rate to every 250 ms I get  

Access Violation at address 004934CA in Mmodule Dyno.exe' Write address 000000F2

Code  

    if SerialPortNG.NextClusterSize >= 0 then begin
       sRaw:=SerialPortNG.ReadNextClusterAsString;
       for i:=1 to length(sRaw) do
          try iData[i]:= byte(sRaw[i])
          except
       end;        

I don't know what I'm looking for.

Thanks Wallace