[[AgustinOrtu]]

Vaya, pesimo de mi parte

El metodo TThread.Execute deberia estar en la seccion protegida de la clase

Código Delphi [-]
  TIpWorker = class(TThread)
  strict private
    FSocket: TClientSocket;
    FOnWorkFinish: TIpWorkerEvent;
    procedure SetOnWorkFinish(const Value: TIpWorkerEvent);
  protected
    procedure Execute; override;
  public
    constructor Create(const AAdress: string; AOnFinish: TIpWorkerEvent);
    destructor Destroy; override;
    property OnWorkFinish: TIpWorkerEvent read FOnWorkFinish write SetOnWorkFinish;
  end;

Y nunca deberiamos llamar a Execute directamente, sino Start

Código Delphi [-]
  for i := 1 to 255 do
  begin
    LWorker := TIpWorker.Create(base + IntToStr(I), OnWorkFinish);
    LWorker.Start;
  end;