I whant that my player and ncps start to slide when they are on a Model, Terrain or block that has an angle of 60.
My code looks like this, but it dosnt work;

VECTOR z_dist;//Of course

if(event_type == EVENT_BLOCK | EVENT_ENTITY && normal.z > 0.75) {
my.z_dist = minv(my.z_dist,-5);
}

Does somebody know how I can fix this???

anybody???

There is no reply because you did not post the important code, your movement/ gravity(!) code.
Btw that's not how you would like to code it, I guess your z_dist is set every frame by your movement code, that means your event will have no effect.
What is my.z_dist supposed to be anyway when you declare z_dist as a global vector?
(I guess you just copied my example code from "Neigung im Raum" and modified it?!)

z_dist = c_trace(my.x,vector(my.x,my.y,my.z-200),IGNORE_ME | IGNORE_PASSABLE)+my.min_z;
if(trace_hit && normal.z > 0.35) { // play with this value
place your sliding code here
}

He thanks that works!