Comment # 13 on bug 947686 from Lukas Ocilka

I've just reproduced the issue.

Control file for Leap 42.1 contains:

<software>
<external_sources_link>http://download.opensuse.org/YaST/Repos/openSUSE_42.1_Servers.xml</external_sources_link>
</software>

Installer then tries to download it:
modules/NetworkService.rb:312 IPv4 network is running ...
clients/inst_productsources.rb:783 Preferred language: en_US en
clients/inst_productsources.rb:445 Got link:
http://download.opensuse.org/YaST/Repos/openSUSE_42.1_Servers.xml
clients/inst_productsources.rb:453 Using link:
http://download.opensuse.org/YaST/Repos/openSUSE_42.1_Servers.xml

and gets:
CurlAgent.cc(Execute):269 Data:
CurlAgent.cc(Execute):270 Output:
/tmp/YaST2-02794-fjya66/inst_productsources_downloadfile
CurlAgent.cc(Get):166 curl returned -> response code: 404, total size: 1046,
total time 0.047204, content type: text/html; charset=iso-8859-1
clients/inst_productsources.rb:500 Server response: $["code":404,
"content-type":"text/html; charset=iso-8859-1", "dsize":1046.0,
"totaltime":0.047204]

We might evaluate the respose code better, but ... well, the error is, that
such file does not exist at the server, but it should. Reassigning.