I [23392-cap12.jpg] am unable to change the value in one blueprint so across blueprints but in another below should be some photos. but then when i’m in the level and I press the [y] key it gives me the errors below. [23394-cap14.jpg]

YOU ARE NOT GETTING WHAT IS GOING ON! i am not trying to print the value of battery charge level when the object is valid i want it to print it out no matter what so now when it prints it out its zero so when it does read the variable it will print 100 so i know its working

and what do you mean by REFERENCE VARIABLES???

CAN SOMEBODY JUST TELL ME WHY THIS IS HAPPENING AND HOW TO FIX IT!!!

your error says access none, that means your reference is Null or Empty. references are the same thing as the light blue pin variables in the graphs, and it is the same thing as a c++ pointer, these blue pin objects need to be checked using IsValid. IsValid checks if pointers are null. if they are n…

reference variables store the memory address of an object. they are the light blue variables.

the photo you attached as part of your question uses a set function. you were setting an integer. setting an object pointer or setting a reference is the same thing. an object reference is the light blue variable type. its like an integer or a string, you have to set its value to something in order …

OK but i don’t get what i have to do to fix this the object variable ‘Character HUD’ is a object of the blueprint ‘Character HUD’ and it points to ‘Character HUD_C’

can you please be more specific i dont understand are you talking about ‘Battery Charge Level’? or the charachter HUD object variable how how would i use the “set function” for this?

was that really so hard to say sorry if im frustrating you but it is hard to understand you

@connormurry Have you gone through the Blueprint tutorial videos posted by Epic in youtube? If not, then please go through it. Also it looks like you don’t have much programming experience. Even though you can do blueprints without serious coding skills, you must have some basic understanding of ho…

Unable to change value of a variable from one blueprint in another

Development Programming & Scripting Blueprint

ScottSpadea (ScottSpadea) December 10, 2014, 5:04am 23