SOLVED I got a Programm error in Gamemaker Drag n Drop

[Aidan]

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

Variable <unknown_object>.on_ground(100003, -2147483648) not set before reading it.
at gml_GlobalScript_check_state (line 6) - if(on_ground == true)
############################################################################################
gml_GlobalScript_check_state (line 6)

Do you know how to fix it? I really need help!

 

[chamaeleon]

Wrap your code in the script in a function definition.

 

[TsukaYuriko]

Relevant:

IMPORTANT!!! GM 2.3 Users Please Read! Improper script usage generates undefined variable errors

Symptoms to Look For Expand for screenshot: The error is in the Create Event for object . The subject is with a variable name that's either built-in or known to be already declared. The stack trace shows the source as something starting with gml_GlobalScript. For Question Askers You are...

forum.yoyogames.com

 

[Aidan]

Relevant:

IMPORTANT!!! GM 2.3 Users Please Read! Improper script usage generates undefined variable errors

Symptoms to Look For Expand for screenshot: The error is in the Create Event for object . The subject is with a variable name that's either built-in or known to be already declared. The stack trace shows the source as something starting with gml_GlobalScript. For Question Askers You are...

forum.yoyogames.com

Thanks but can somebody give me an Example How Enumerators work in version 2.3

 

[TsukaYuriko]

Although I'm not sure how this related to the original topic, the Constants page of the manual should be sufficient.

 

[Aidan]

Although I'm not sure how this related to the original topic, the Constants page of the manual should be sufficient.

I didnt want to make a new thread (because my prblem stems from my only Code which is about Enums) also the Tutorial is sadly Outdated

 

[chamaeleon]

I didnt want to make a new thread (because my prblem stems from my only Code which is about Enums) also the Tutorial is sadly Outdated

Your problem does not stem from using enums. Your problem stems from not having a function definition for your code in the script that contains the on_ground comparison.

 

[Slyddar]

The code looks like it's from one of my tutorials. The pinned comment, and the description of each video, mention this, which if followed, corrects the error :

** NOTE : 2.3 changes in Gamemaker ** As of August 2020, Gamemaker 2.3 has been released, and has changed the way scripts work. They are now added as functions, and when you create a script you will see a "Define a New Function" codeblock. The tutorial still works fine, but ensure all code for scripts is added under it's Define a New Function codeblock, otherwise you will get an error. For more information see this thread - https://forum.yoyogames.com/index.php?threads/dnd-code-error.78336/post-465045

 

[TailBit]

Set on_ground to a value in the create event

Oh wait, you are trying to use it in the create event, well you need to declare it first.

 

[chamaeleon]

Set on_ground to a value in the create event

Oh wait, you are trying to use it in the create event, well you need to declare it first.

It doesn't matter if it's declared in the Create event if the code using it is not wrapped in a function. If the code isn't, the code will run at game start before the instances exist.

 

[Aidan]

Thanks a lot this problem is Solved Sorry for multiple threads