[news.eclipse.technology.equinox] How to Mirror from an Update site from

[cgs.schaefer@xxxxxxxxx (Christian Schaefer)]

We try to mirror the ganymede 3.4.2 update site to a local directory like 
this:

-application org.eclipse.update.core.standaloneUpdate -command mirror 
-ignoreNonPresentPlugins true -from 
http://download.eclipse.org/releases/ganymede/ -to D:\some_dir -mirrorURL 
file://D:\some_dir

it still fails for some plugins currently getting this:

!MESSAGE Unable to retrieve remote reference 
"http://download.eclipse.org/releases/ganymede/plugins/org.eclipse.swt.win32.win32.ia64_0.0.0.jar";. 
[Server returned HTTP response code: "404 Not Found" for URL: 
http://download.eclipse.org/releases/ganymede/plugins/org.eclipse.swt.win32.win32.ia64_0.0.0.jar.]
!STACK 0
org.eclipse.update.internal.core.FatalIOException: Server returned HTTP 
response code: "404 Not Found" for URL: 
http://download.eclipse.org/releases/ganymede/plugins/org.eclipse.swt.win32.win32.ia64_0.0.0.jar.
at 
org.eclipse.update.internal.core.UpdateManagerUtils.checkConnectionResult(UpdateManagerUtils.java:564)

How can i get this to work correctly please ?