@cuuore because your antivirus is deleting it. If it was disabled it wouldn't be deleting it.

I feel your use of loops is unnecessary, wasteful and most definitely not performant. Why not just append x score at the end of the round?

for(;;)
{
	self welcome();
	self addScore();
}

This is the part that confuses me. Why loop this? Just call it once on spawn.

This will execute every time the round ends which is fine:

while (1) 
{
level waittill("between_round_over");
//self iprintln("More Score");
self.score+=1500;
}

Look at gsc dumps, try editing stock files and see your changes in action. MW2 is a good game to learn on. Iw4x is the client for mw2 and this client supports GSC loading.

Close it and re-open it

@xallacy Please just don't.
Thanks.

It's by design and intended currently. It was a workaround for zombies as the game doesn't support map rotation in zombies.

If there is no network activity then something is wrong. Close and re-launch piry.exe and try again.

Dude you are trying to run the game from a ZIP file????

Re-run Piry.exe and try again. If the error persists try a reboot and try again. If the issue still persists it's most likely another piece of software interfering with the game these can include but are not limited to the following:
-FPS overlays
-Recording software
-Antivirus software
-Ccleaner
etc.

Consult your ISP documentation / contact them. This forum is not x ISP provider support forum.