[knewace]

hi,

i am getting a protocol family not supported error when jdownloader tries to open captcha on browser.

i am not having any problems when it tries to open captcha on Jdownloader window, just on browser.

i have uploaded a screenshot of it.

**External links are only visible to Support Staff**

[notice]

@knewace: can you please provide a screenshot of the about dialog of JDownloader?
https://support.jdownloader.org/Know...tion-directory

Also please check your system for these applications, see
https://support.jdownloader.org/Know...lation-process

What OS is this?

The error means that your OS does not provide support to bind TCP socket, which is sign for driver/configuration issue or some software /eg vpn/scanner/bad tools are messing with the network stack.

[knewace]

i only use JDownloader on my old system running windows 7 64bit for various reasons.

I do not use it and have not even installed it on my gaming pc running windows 10. Don't want anything running that will ruin my gaming performance.

Could windows 7 be the problem. It was running fine just sometime ago. I don't have any problem even now when i am downloading stuff.
It was working fine sometime ago.

**External links are only visible to Support Staff**

[notice]

@knewace: if you want we can take a look at this together? contact us via support@jdownloader.org
Have you checked those applications that are known to cause those issues? any firewall/vpn on system?
There are no known issues with windows 7 or any other windows version.

[knewace]

i use 360 Total security as firewall. i disabled it and then checked it. Still have that same problem. Did not have any problem about a week ago.

[notice]

Originally Posted by knewace

i use 360 Total security as firewall. i disabled it and then checked it. Still have that same problem. Did not have any problem about a week ago.

The error comes from OS as it states that it's not possible to bind on IPv4/IPv6 dual stack socket.
You may try to disable IPv6 support, start JDownloader with following command line

-Djava.net.preferIPv4Stack=true

Something must have changed. Either something messes with network driver/stack or some network changes.

[knewace]

-Djava.net.preferIPv4Stack=true

No luck on that. same error


I tried this

-Dsun.java2d.d3d=false
-Djava.net.preferIPv4Stack=false

This seems to work. I don't have that problem now.

i added that line in JDownloader2.vmoptions


will update if i face problem. Works fine now

[notice]

@knewace: thanks for the feedback. it's very strange that it works with explicit enable ipv6 dual stack.