ZDoom

Then it must be added to wiki.

I write it because I cant do so.

NOINTERACTION needs to set NOBLOCKMAP because the actor does not get linked into the blockmap. But if the flag is cleared, some code may try to access the block links and crash.

Sorry, can't change.

If I knew that, I could move this topic to closed bugs along with the explanation.
From what I saw in the code NOINTERACTION flag is switching on NOBLOCKMAP implicitly.
There is no way to restore it back, i.e. engine doesn't track any flag changes between game tics.
No matter bug or feature it is, to make work at the moment you need to call [b]A_ChangeLinkFlags(0)[/b] on the same actor.

And why it works in such way? "No interaction"is a some kind of a flag comdo?

A_ChangeLinkFlags(0);

After removing NOINTERACTION flag you need to explicitly restore BLOCKMAP flag by calling [code]A_ChangeLinkFlags(0);[/code]

class tdi : doomimp
{

override void tick()
{
	if( (level.time % 373) == 0){self.bnointeraction = true; console.printf("Im horror flying on the wings of night");}
	if( (level.time % 757) == 0){self.bnointeraction = false; console.printf("I should work, but I dont work");}
	super.tick();
}
}

Actor cant remove nointeraction flag from himself.
Same with pointers to such actor.
[code]
class tdi : doomimp
{

override void tick()
{
if( (level.time % 373) == 0){self.bnointeraction = true; console.printf("Im horror flying on the wings of night");}
if( (level.time % 757) == 0){self.bnointeraction = false; console.printf("I should work, but I dont work");}
super.tick();
}
}[/code]