How To Fix The libs.CopyLibs.classpath Problem in NetBeans 7

I recently made some updates to my NetBeans development environment and encountered this weird error:

d:\dev\myproject\nbproject\build-impl.xml:485: The libs.CopyLibs.classpath property is not set up.
This property must point to
org-netbeans-modules-java-j2seproject-copylibstask.jar file which is part
of NetBeans IDE installation and is usually located at
/java/ant/extra folder.

Either open the project in the IDE and make sure CopyLibs library
exists or setup the property manually. For example like this:
ant -Dlibs.CopyLibs.classpath=a/path/to/org-netbeans-modules-java-j2seproject-copylibstask.jar

BUILD FAILED (total time: 0 seconds)

I was able to resolve it by following these steps:

  1. In NetBeans, select Tools > Options > Miscellaneous > Ant
  2. In the Properties section, add the following property

Click OK and Build your project again. This error will go away. Hope this helps. Happy coding!

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  1. Comments  Amit   |  Wednesday, 24 April 2013 at 6:19 am

    Thanks. This works.

  2. Comments  Garry   |  Friday, 10 May 2013 at 10:17 am


    In Netbeans 7.2 the Ant is at Tools > Options > Java 😉


  3. Comments  doos   |  Friday, 03 January 2014 at 10:03 am

    Thank you much!)
    p.s. garry +)

  4. Comments  Fakiraddi   |  Wednesday, 19 February 2014 at 10:21 am

    Thank u it work… 🙂

  5. Comments  sezhian   |  Wednesday, 16 April 2014 at 3:54 am

    Thanks Man ! it worked and saved me 2 hours

  6. Comments  sezhian   |  Wednesday, 16 April 2014 at 3:54 am

    Thanks Man ! it worked and saved me 2 hours.Good Work

  7. Comments  Ghulam Mohammed   |  Wednesday, 23 April 2014 at 3:01 am

    Thanks man it worked like a charm.

  8. Comments  Rajesh   |  Friday, 09 May 2014 at 1:16 pm

    I didnt find the properties option in both Tools > Options > Java and Tools > Options > Miscellaneous > Ant

  9. Comments  Chad Darby   |  Friday, 09 May 2014 at 2:22 pm

    Hi Rajesh,

    The steps above work for NetBeans 7.3 on MS Windows.

    What version of NetBeans are you using? Also, what OS?

  10. Comments  helo   |  Monday, 12 May 2014 at 5:55 am

    There is already something mentioned in the property as “build.compiler.emacs=true”.. should I delete this? or copy in the next line?

  11. Comments  anonimo   |  Monday, 30 June 2014 at 11:39 am

    wow, thanks man

  12. Comments  Nelson   |  Sunday, 28 February 2016 at 12:06 am

    Thanks man!!!! Amazing

  13. Comments  Nelson   |  Sunday, 28 February 2016 at 12:08 am

    Thanks man!!!! Amazing godbless

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