Code:
jet = ent_create ("mig.hmp", vector(-400,0,100), NULL);

jet / mig is not .mdl!?
turn splash screen off
use [ code ] [ code ] tags

Code:
#include <acknex.h>
#include <default.c>

VECTOR jet_speed;
ENTITY* jet;

function main() {
	video_mode = 7;
	//set(pSplash,VISIBLE);	// splash screen on
	//wait(-3);
	//reset(pSplash, VISIBLE);	// splash screen off
	
	printf("test");
	fps_max = 140;
	level_load("riverbed.hmp");
	ent_createlayer("blood_gsmall+6.tga", SKY | CUBE | VISIBLE, 0);
	wait(2);
	jet = ent_create ("mig.mdl", vector(-400,0,100), NULL);
	ph_setgravity (vector(0,0, -386));
	phent_settype (jet, PH_RIGID, PH_CUBE);
	phent_setmass (jet, 3, PH_CUBE);
	phent_setfriction (jet, 80);
	phent_setdamping (jet, 40, 40);
	phent_setelasticity (jet, 50, 20);
	while(1) {
		jet_speed.x = 25 * (key_a - key_d);
		jet_speed.y = 25 * (key_w - key_s);
		jet_speed.z = 25 * (key_cuu - key_cud);
		phent_addtorqueglobal (jet, jet_speed);
		camera.x = jet.x - 300;
		camera.y = jet.y;
		camera.z = jet.z;
		camera.tilt = -60;
		wait (1);
	}
}