Which Operating System ?

If it is Windows 32-bit. See http://www.slicer.org/slicerWiki/index.php/Documentation/Nightly/FAQ#Why_there_are_no_windows_32-bit_extensions_available_.3F

Re-open if you still have issue.

Note also that:

• there are no extensions for windows 32-bit. See [1]

• in the past few days, the extensions factory was on-going some maintenance [2]

[1] http://www.slicer.org/slicerWiki/index.php/Documentation/Nightly/FAQ#Why_there_are_no_windows_32-bit_extensions_available_.3F

[2] http://slicer-devel.65872.n3.nabble.com/Windows-nightly-not-on-download-page-tt4029503.html

My operating system is ubuntu 12.04 LTS 64 bits.

I still have an error message when I try to connect to midas3: "Failed to load extension page using the following URL:
http://slicer.kitware.com/midas3/slicerappstore?layout=empty&os=linux&arch=amd64&revision=22234

There are no extension associated with r22234 of Slicer as illustrated in [1].

On the other hand, there are extensions associated with r22233. See [2]

Can you try downloading nightly package associated with Slicer revision 22233? See [3] and [4]

[1] http://slicer.kitware.com/midas3/slicerappstore?layout=empty&os=linux&arch=amd64&revision=22234

[2] http://slicer.kitware.com/midas3/slicerappstore?layout=empty&os=linux&arch=amd64&revision=22233

[3] http://slicer.cdash.org/index.php?project=Slicer4&date=2013-07-24

[4] http://slicer.cdash.org/viewFiles.php?buildid=130678

Thank's a lot for the answer.
I will try.

I have installed http://slicer.cdash.org/viewFiles.php?buildid=130678 but I still have an error message when I try to connect to midas3: "Failed to load extension page using the following URL:
http://slicer.kitware.com/midas3/slicerappstore?layout=empty&os=linux&arch=amd64&revision=22233

I have a proxy in my institute, I have configured it in my system settings (I can access with firefox to revision 22233). Should I configure something else in slicer?

ddldave, it is because dear developers forgot to make qt use environment proxy... Probably it will be fixed soon, but until that:

Go to your python module directory.(Edit--> Application Settings --> Modules helps to find it.) Create python's new file /or add those to any existing.

import qt
qt.QNetworkProxy.setApplicationProxy(qt.QNetworkProxy(qt.QNetworkProxy.HttpProxy, "proxy", port));

Till example:
import qt
qt.QNetworkProxy.setApplicationProxy(qt.QNetworkProxy(qt.QNetworkProxy.HttpProxy, "proxy****.fi", 1234));

Save & Restart

Aleks

P.S. New python file will cause a warning message on startup, because there is no Slicer module description in python file you made... Just ignore it, or add to any existing module to avoid such warning.

Few remarks:

1) To have python code automatically executed at startup, you could simply put it in a file named .slicerrc.py in your home folder.

2) As illustrated in [1], we are already instructing Qt to use system proxy. Do you know why this is not working in your case ?

3) Would it help to add an entry in the settings allowing to not use system proxy and provide a filed to configure a custom proxy ?

[1] https://github.com/Slicer/Slicer/blob/69534eab460dfe13231413f2c8c60d6bc41ece16/Base/QTCore/qSlicerCoreApplication.cxx#L258

jcfr, thanks for correction+hint.

1. Well, my bad, but don't find that file... Or you mean any file starting with dot in any included directory with lines wrote earlier?

2. Best guess is that in hospitales, where (possibly) ddldave and me working, patients protection is on proper level, so you shouldn't get through firewalls etc filters unintentionally. System setting are either not defined, or defined, but requires to manually add permissions for program and user to use them. High privacy protection, but makes sense... However it can be only one of limitations.

3. Sure! Perfect idea, easy script, and in settings it will be easy to find. Waiting for it! :)
   (Pls remember to reproxify python aswell for scripts to download internet data etc. ;) )
   And it would be nice, if you can choose what to proxify. (Like downloading extensions, but not allowing scripts.)

Aleks

1. See http://www.slicer.org/slicerWiki/index.php/Documentation/Nightly/Developers/FAQ/Python_Scripting#How_to_systematically_execute_custom_python_code_at_startup_.3F

2 & 3. See 0003329 and 0003330 - Targeted for 4.4

Since the problem explaining why extensions are not showing up has been captured by issues 0003329 and 0003330. Closing this one.