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HOW DO I FIX THIS BLUEPRINTS BUG

Error Blueprint Runtime Error: Accessed None trying to read property box-u-dead from function: 'ExecuteUbergraph_BOX-G-UP-DEAD' from node: AddActorLocalOffset in graph: EventGraph in object: BOX-G-UP-DEAD with description: Accessed None trying to read property box-u-dead

Product Version: UE 4.14
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asked Dec 18 '16 at 02:26 AM in Bug Reports

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ALI_MOHAMMAD
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1 answer: sort voted first

If you read the error one piece at a time you will understand it (it took me a while to read them and understand them).

Accessed None trying to read property box-u-dead

This tells you you're code is accessing a variable called "box-u-dead" that is currently NULL (none) and treating it like an object because somewhere else you are expecting it to be an object, like an Actor reference.

from function: 'ExecuteUbergraph_BOX-G-UP-DEAD'

Do you have an object, function or event called BOX-G-UP-Dead? Because it's within that object/function/event where this error is happening.

from node: AddActorLocalOffset

So the blueprint function you are calling that's accessing this variable at the time it's NULL/NONE is the AddActorLocalOffset node and this call is triggering this error.

in graph: EventGraph

Within your BOX-G-UP-DEAD Actor you have an event graph called "EventGraph". It's within this event graph where the error is happening.

in object: BOX-G-UP-DEAD

And again it's within an Object/Actor called BOX-G-UP-DEAD

The solution? Before you use the variable "box-u-dead" pass it through an "IsValid?" node to make sure it's not NONE/NULL before you use it.

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answered Dec 18 '16 at 02:39 AM

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elitereloaded
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avatar image ALI_MOHAMMAD Dec 18 '16 at 07:14 AM

i put 2 BLUEPRINTS class in level and i want him to communication and i use blueprints target to communicate its woke when i put the blueprint in level for the first time but when i put the blueprints many time he give me that error

avatar image elitereloaded Dec 18 '16 at 07:25 AM

Could you provide me with screenshots of your blueprint code and the surrounding code so I can have a better understanding of what you are trying to do?

avatar image ALI_MOHAMMAD Dec 18 '16 at 08:32 AM

alt text

bug.png (1.3 MB)
avatar image Rudy Q ♦♦ STAFF Dec 19 '16 at 04:41 PM

Hello LI_MOHAMMAD,

I would like to stat that elitereloaded has given a good break down of the error that you are receiving. If you still need additional assistance, I have a few questions for you that will help narrow down what issue it is that you are experiencing.

Quick questions:

  1. Can you reproduce this issue in a clean project?

  2. If so, could you provide a detailed list of steps to reproduce this issue on our end?

  3. Could you provide screen shots of any other blueprints/settings that may be involved with this issue?

avatar image ALI_MOHAMMAD Dec 19 '16 at 06:53 PM

when i want my blueprint target to target another blueprint he target my blueprint character for no reason and he dose not target the blueprint that i want to target it work in first time but when u use the blueprint many time it dose not work i think the error with engine

avatar image ALI_MOHAMMAD Dec 19 '16 at 06:56 PM

i did it with clean project is same error

avatar image Rudy Q ♦♦ STAFF Dec 19 '16 at 07:16 PM

Thank you for the additional information. However, I will need you to answer the other question from my previous post. Could you provide a detailed list of steps so that I can reproduce this on our end. This will allow me to get a better understanding of what exactly is happening in your project.

avatar image ALI_MOHAMMAD Dec 19 '16 at 07:55 PM

1- i make blueprint to communication another blueprint

2- the first blueprint is box collision and on begin overlap he will open a level

3- The second blueprint is box collision and on begin overlap he will move the first blueprint by use blueprint target to communication

4- i set 2 blueprint in level and i set the target and i need to copy this 2 blueprint 20 time to set in level

5- when my blueprint character overlap The second blueprint its work for the first but when i move to another blueprint same The second blueprint sometime its dose not work sometime he target my blueprint character for no reason

avatar image ALI_MOHAMMAD Dec 19 '16 at 07:58 PM

alt text

avatar image Rudy Q ♦♦ STAFF Dec 20 '16 at 06:48 PM

After running a few tests, I am still unable to reproduce this issue on our end. Could you provide a zipped down version of the project that is experiencing this issue so that I could take a closer look?

avatar image ALI_MOHAMMAD Dec 21 '16 at 09:38 PM

the project size is too large to upload here

avatar image ALI_MOHAMMAD Dec 21 '16 at 11:02 PM

i fix it. the Problem is that the box collision Should not overlap one another u have to Separates them when they move in level.they Should not touch with each other. thanks for your time Rudy Triplett and elitereloaded

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