Eclipse Mars: ANT Task references missing SWT library

Question

I just upgraded to Eclipse Mars and suddenly my ANT task working fine with Lunar complains:

The archive: C:/Program%20Files/eclipse_lunar/plugins/org.eclipse         


        

Answer 1

A possible solution is to create the folder "C:\Program%20Files\eclipse_lunar\plugins" and place a copy of the actual *.jar from "C:\Program Files\eclipse_lunar\plugins" there

Answer 2

This worked for me:

mklink /D D:\Program%20Files "D:\Program Files"

Answer 3

Move the eclipse program directory to another folder wihtout spaces

• for example simply to c:\eclipse

Answer 4

Problem:

Error message:

The archive: C:/Program%20Files%20(x86)/Eclipse%20Mars/plugins/org.eclipse.swt.win32.win32.x86_64_3.104.0.v20150528-0211.jar which is referenced by the classpath, does not exist.

The problem was the Eclipse Mars is downloaded and extracted under a folder which space contained in its name. In the above error message the path contains folder names with spaces in between and displayed as %20.

Solution:

Inorder to solve this use anyone of the workaround mentioned below,

• Remove any spaces in any of the directory where you have stored Eclipse.
  eg: Rename My Folder to MyFolder
• Move you eclipse to the root of any drive(C: or D: or F: etc)
  eg: D:\eclipse-jee-mars-R-win32-x86_64

• Create a symbolic link folder in windows using mklink command,

  mklink /d D:\My%20Folder "D:\My Folder"

You'll get the following message,

symbolic link created for D:\My%20Folder <<===>> D:\My Folder

Note: For creating symbolic link you need to run the above command in the elevated command prompt.

Now you can run the ant scripts without the above error. This is a bug reported to eclipse and will be patched in the future releases.