Isometric game

[Mikkel]

Hello game developers.

I'm currently following a tutorial on youtube on how to make your own isometric game. Also I am very new to this programming language.
This error keeps showing every time I execute the game. How do I fix this?

Btw this is the youtuber I am following. Heres a link to his video...

___________________________________________
############################################################################################
ERROR in
action number 1
of Create Event
for object <undefined>:

DoAdd :1: undefined value
at gml_GlobalScript_TileToRoomY (line 3) - return ((_tX + _tY) * (TILE_H * 0.5));
############################################################################################
gml_GlobalScript_TileToRoomY (line 3)


Thanks in advance.

 

[NightFrost]

This issue is explained in the sticky post at the top of this subforum. (In short: the tutorial is pre-GMS2.3.)

 

[Mikkel]

This issue is explained in the sticky post at the top of this subforum. (In short: the tutorial is pre-GMS2.3.)

Ahhh, okay. That makes sense. Is there any way to get around this?

 

[TsukaYuriko]

The way to get around this is explained in the sticky post at the top of this subforum.

 

[Mikkel]

The way to get around this is explained in the sticky post at the top of this subforum.

haha nvm I must have overlooked it. Yeah I figured it out. Thanks.