Andreas,

> yes, i am using loops to process incoming data. Just like
> 
> 
> FCom.Putblock()
> repeat
>   application.processmessages;
> until Allreceived or timeout;
> 
> What can I do then, to get it work correctly?

Since you have application.processmessages in your loop, the loop itself 
should not be the problem.


Is this loop in an AsyncPro event handler or in a routine that is called 
from an AsyncPro event handler?  The fact that the output is delayed by 
two seconds seems to indicate something like that might be the issue.


-- 
Regards,
Paul Breneman
http://www.TurboControl.com
http://www.turbocontrol.com/TPSupport.htm - TurboPower support links