help with switch statements

[confusedperson]

I went along with a tutorial for unlocking levels which was made in 2013. hopefully not much has changed and I just made a mistake on my behalf however the error reads:

Variable obj_levelsystem.level(100007, -2147483648) not set before reading it.
at gml_Object_obj_levelsystem_Create_0 (line 4) - case 0:

and my coding for the create event is:

image_speed = 0;
switch(level){
case 0:
image_index = 0;
break;

case 1:
image_index = 1;
break;

case 2:{
image_index = 2;
break;

I am very new to game maker and I hope I can continue in the future with your help. thank you in advance.

 

[Simon Gust]

How does your object know what "level" is suposed to be? You haven't set it anywhere.

 

[Niels]

Your "level" variable controls your switch, and it seems like you haven't initialized that variable before the switch.