TOPIC:

I have download CodeTyphon the day before yesterday. And I install a new Ubuntu 12.04 into a VirtualBox, and then I install CodeTyphon in it.

I start Lazarus, I have placed a button, a IdUDPServer on to the form. and I write some code in button's OnClick event handler like this:

IdUDPServer1.DefaultPort := 3467;
IdUDPServer1.Active := True;


Run this program, and when I click the button, I get a exception when it goto IdUDPServer1.Active := True;

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BTW. I add 2 file -- the exception's screen picture and when I submit this topic, I got a error!

500 Internal Server Error

Fatal Error was detected!

Please contact the site owner.

the exception message is:

I setup a break in my code, and I got the exception code here:

Thanks Sir
We will check this

Thanks for your attention sir.

After some search on Internet I found that when we use Indy under Linux, we must:

1. Porject unit's uses part first line must be:

I check that Lazarus from CodeTyephon has add this code for us.


2. Compiler params: In project option -- other page, add -dUseCThreads in it.

3. Set IdUDPServer IPVersion to IPV4;

And then the exception is gone. And I can set IdUDPServer1.Active := True; and IdUdpServer can receive UDP package from net.

But, IdUDPServer1.Send or SendBuffer has no effect. I cann't send any data to the net.

BTW. there is no problem like this under Delphi with Indy10.