Windows old text not working?

[Omega]

I keep getting this error and i have no idea why ? i think it could be old text not working with GM 2 :


___________________________________________
############################################################################################
FATAL ERROR in
action number 1
of Step Event0
for object obj_checkpoint:

global variable name 'checkpointR' index (100018) not set before reading it.
at gml_Object_obj_checkpoint_Step_0 (line 11) - if (global.checkpointR == room)
############################################################################################

Code:

step

image_angle += 1;

if (place_meeting(x,y,obj_player))
{
global.checkpoint = id;
global.checkpointx = x;
global.checkpointy = y;
global.checkpointR = room;
}

if (global.checkpointR == room)
{
if (global.checkpoint == id) image_index = 1; else image_index = 0;
}

 

[FrostyCat]

If place_meeting(x, y, obj_player) is false and you haven't declared global.checkpointR anywhere else, global.checkpointR would stay uninitialized by the time you intend to check it. Set it to something like -1 at the beginning of the game.

The potential for problems like this is the reason why declaring instance and global variables inside conditional blocks is rarely a sound move.