• Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
  • Asset Store
  • Get Unity

UNITY ACCOUNT

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account
  • Blog
  • Forums
  • Answers
  • Evangelists
  • User Groups
  • Beta Program
  • Advisory Panel

Navigation

  • Home
  • Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
    • Blog
    • Forums
    • Answers
    • Evangelists
    • User Groups
    • Beta Program
    • Advisory Panel

Unity account

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account

Language

  • Chinese
  • Spanish
  • Japanese
  • Korean
  • Portuguese
  • Ask a question
  • Spaces
    • Default
    • Help Room
    • META
    • Moderators
    • Topics
    • Questions
    • Users
    • Badges
  • Home /
avatar image
0
Question by theUndeadEmo · Jan 19, 2012 at 10:27 PM · instance

Object reference not set to an instance of an object?

this is rather weird, it occasionaly works for one enemy and not the other. furthermore i am using the same method for my other scripts and yet this one does not work, this script is attached aswell

 private Survive survive;
 private Attack attack;
 private Vector3 followCoordinates;
 void Start ()
 {
     type = false;
     attack= GetComponent<Attack>();
     survive= GetComponent<Survive>();
 }
 public Vector3 returnCoordinates ()
 {
     if (type == true) {
         followCoordinates = attack.returnAttack ();
     }
     if (type == false) {
     followCoordinates = survive.returnWaypoint ();
     }
     return followCoordinates;    
 }


how is it possible for the attack script to work and the survive not working, even though i am using the same method and both are attached to the gameObject?

Comment
Add comment
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users

1 Reply

· Add your reply
  • Sort: 
avatar image
0

Answer by aldonaletto · Jan 19, 2012 at 11:30 PM

If the scripts Attack and Survive and the script above are attached to the same object, this should work. You could add some debugging instructions to help finding the problem:

void Start ()
{
    type = false;
    attack= GetComponent();
    if (!attack) print("Attack not found in "+name);
    survive= GetComponent();
    if (!survive) print("Survive not found in "+name);
}
Check also if some script was not attached to a child by mistake (GetComponent will not search in the children).
Comment
Add comment · Share
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users

Your answer

Hint: You can notify a user about this post by typing @username

Up to 2 attachments (including images) can be used with a maximum of 524.3 kB each and 1.0 MB total.

Welcome to Unity Answers

If you’re new to Unity Answers, please check our User Guide to help you navigate through our website and refer to our FAQ for more information.

Before posting, make sure to check out our Knowledge Base for commonly asked Unity questions.

Check our Moderator Guidelines if you’re a new moderator and want to work together in an effort to improve Unity Answers and support our users.

Follow this Question

Answers Answers and Comments

5 People are following this question.

avatar image avatar image avatar image avatar image avatar image

Related Questions

How can I modify a variable on an instance of a prefab after I created it? 2 Answers

Create an Instance? 2 Answers

Unity importing Instances wrong via FBX. 4 Answers

Getting instance ID from position 1 Answer

Destroy instances after set time 1 Answer


Enterprise
Social Q&A

Social
Subscribe on YouTube social-youtube Follow on LinkedIn social-linkedin Follow on Twitter social-twitter Follow on Facebook social-facebook Follow on Instagram social-instagram

Footer

  • Purchase
    • Products
    • Subscription
    • Asset Store
    • Unity Gear
    • Resellers
  • Education
    • Students
    • Educators
    • Certification
    • Learn
    • Center of Excellence
  • Download
    • Unity
    • Beta Program
  • Unity Labs
    • Labs
    • Publications
  • Resources
    • Learn platform
    • Community
    • Documentation
    • Unity QA
    • FAQ
    • Services Status
    • Connect
  • About Unity
    • About Us
    • Blog
    • Events
    • Careers
    • Contact
    • Press
    • Partners
    • Affiliates
    • Security
Copyright © 2020 Unity Technologies
  • Legal
  • Privacy Policy
  • Cookies
  • Do Not Sell My Personal Information
  • Cookies Settings
"Unity", Unity logos, and other Unity trademarks are trademarks or registered trademarks of Unity Technologies or its affiliates in the U.S. and elsewhere (more info here). Other names or brands are trademarks of their respective owners.
  • Anonymous
  • Sign in
  • Create
  • Ask a question
  • Spaces
  • Default
  • Help Room
  • META
  • Moderators
  • Explore
  • Topics
  • Questions
  • Users
  • Badges