An Internal Error Occurred During Launching . Java.lang.nullpointerexception
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up An internal error occurred during: “Launching Project”. java.lang.NullPointerException up vote 4 down vote favorite My android project was compiling well but suddenly it stopped launching. Then I tried to launch other projects from Project Explorer and all project threw same exception: An internal error occurred during: "Launching Project". java.lang.NullPointerException But console always shows everything is normal. Android Launch! adb is running normally. Performing com.mmcolrev.LoginActivity activity launch Here's screenshot of error. android eclipse nullpointerexception adt share|improve this question edited Aug 6 '15 at 13:00 sashoalm 18.7k32149322 asked Sep 15 '14 at 12:03 Crawler 1,0601927 Try to fix project depedencies, I had some similar problem, also occured SUDDENLY. I had to repair the project-properties and then update source files of project again, iirc. –icbytes Sep 15 '14 at 12:11 I did that but it doesnt work. –Crawler Sep 15 '14 at 13:08 Did You spot the section of code, where it crashes ? And what are the details? –icbytes Sep 15 '14 at 13:29 Problem is not in my code, its in ADT. All project while launching gives same internal error. They were just working fine some moment ago, before first time this error showed up. –Crawler Sep 15 '14 at 15:12 Yes, but expand the details please. –icbytes Sep 15 '14 at 15:31 add a comment| 6 Answers 6 active oldest votes up vote 6 dow
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up JUnit4 + Eclipse “An internal error occured during Launching” up vote 16 down vote favorite 4 I'm trying to run JUnit4 test cases on Eclipse 3.4.2 but http://stackoverflow.com/questions/25847674/an-internal-error-occurred-during-launching-project-java-lang-nullpointerexc it's not even starting for me. I have the junit-4.7.jar in my build path and the test application. Here is a simple example that illustrates my problem package test; import org.junit.Before; import org.junit.Test; public class UTest { @Test public void test() { } @Before public void setUp() throws Exception { } } This compiles fine Then I do "Run JUnit Test case" from Eclipse and I get an error dialog with this message "Launching UTest' has encountered http://stackoverflow.com/questions/1250505/junit4-eclipse-an-internal-error-occured-during-launching a problem An internal error occurred during: "Launching UTest". java.lang.NullPointerException What causes these NullPointerExceptions? What am I doing wrong? java eclipse junit share|improve this question edited Nov 16 '14 at 19:38 Eric Leschinski 45.9k23219189 asked Aug 9 '09 at 3:28 Mike 15.4k49135177 add a comment| 10 Answers 10 active oldest votes up vote 28 down vote What worked for me after trying everything: Go to help Install New Software Work with: Juno Programming languages (expand it) Install Java Development Tools Restart It works :) share|improve this answer answered Oct 22 '14 at 21:31 Joaquin De La Sierra 40646 1 Thank you very much! This worked for me, too! –Sam Oct 24 '14 at 10:37 4 The name of the package I had to install was Eclipse Java Development Tools rather than just Java Development Tools. –Sam Oct 24 '14 at 10:49 @Sam What will be the update url? I am already having Juno with ADT 23.0.2. –devo Nov 2 '14 at 4:18 @devo, mine is download.eclipse.org/releases/juno. –Sam Nov 3 '14 at 11:07 @devo The update site already comes with Eclipse itself. Just open up the drop-down menu and you'll find it. –JI Xiang Dec 3 '14 at 14:51 | show 3 more comments up vote 3 down vote This worked for me: create another copy of the test class (CopyOf
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