In the string definitions:

Code:
string shell_mdl=<shell.mdl>;


should be
Code:
string shell_mdl="shell.mdl";


In function move_bullets()

Code:
my.enable_impact=on;
my.enable_entity=on;
my.enable_block=on;


should be
Code:
my.emask |= (ENABLE_IMPACT | ENABLE_ENTITY | ENABLE_BLOCK);


In action my_enemy()


Code:
my.polygon=on;
my.health=100;
my.enable_impact = on;
my.event=got_shot;
my.passable=on;
my.status = idle;


Needs to change. Flags are set with the set() macro defined in acknex.h and event flags are set with emask:

Code:
my.health = 100;
my.status = idle;
my.emask |= (ENABLE_IMPACT);
my.event = got_shot;
set(my,PASSABLE | POLYGON);

Code:

vec_set(temp, player.x);
vec_sub(temp,my.x);
vec_to_angle(my.pan,temp);


Temp needs to be declared, it is not a predefined variable anymore.

Code:
death_percentage +=3 * time;


time was replaced with time_step, each time you see time in the code.

I was once Anonymous_Alcoholic.

Code Breakpoint;