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    <title>topic Re: nested asn1 error (_ssl.c:3947) in Fusion Support Forum</title>
    <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/13796875#M208820</link>
    <description>&lt;P&gt;Hi everyone,&lt;/P&gt;&lt;P&gt;I have uninstalled Čelik and deleted all MUP certificate that I could find, restarted and cleaned trash, turned off firewall and antivirus and it still wan't install.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Please help.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;David&lt;/P&gt;</description>
    <pubDate>Thu, 04 Sep 2025 14:35:09 GMT</pubDate>
    <dc:creator>daviddQ6KRQ</dc:creator>
    <dc:date>2025-09-04T14:35:09Z</dc:date>
    <item>
      <title>nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9069024#M135046</link>
      <description>&lt;P&gt;I'm receiving&lt;EM&gt; nested asn1 error(_ssl.c:3947)&lt;/EM&gt; when I try to install Fusion 360.&lt;/P&gt;&lt;P&gt;Does someone have idea what could be the reason?&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;This is segment from log file:&lt;/P&gt;&lt;P&gt;"2019-10-05 12:42:08,578 - MainProcess(6272) - InstallDriver - adsk.dls.streamer.netlib - WARNING :: Failed to get speed data nested asn1 error (_ssl.c:3947)"&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Thank you.&lt;/P&gt;&lt;P&gt;Best regards,&lt;/P&gt;&lt;P&gt;Dusan.&lt;/P&gt;</description>
      <pubDate>Sat, 05 Oct 2019 19:42:37 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9069024#M135046</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2019-10-05T19:42:37Z</dc:date>
    </item>
    <item>
      <title>Re: nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9070507#M135047</link>
      <description>&lt;P&gt;Same problem.&amp;nbsp;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Here is log file.&amp;nbsp;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Capture.JPG" style="width: 881px;"&gt;&lt;img src="https://forums.autodesk.com/t5/image/serverpage/image-id/685090iCD25285E2BE009E9/image-size/large?v=v2&amp;amp;px=999" role="button" title="Capture.JPG" alt="Capture.JPG" /&gt;&lt;/span&gt;&lt;/P&gt;</description>
      <pubDate>Mon, 07 Oct 2019 09:45:36 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9070507#M135047</guid>
      <dc:creator>Nikola_Perunmoto</dc:creator>
      <dc:date>2019-10-07T09:45:36Z</dc:date>
    </item>
    <item>
      <title>Re: nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9072859#M135048</link>
      <description>&lt;P&gt;same here????&lt;/P&gt;&lt;P&gt;i cant install fusion 360. i was having problems with the update, so i uninstall it and now i can not install it....&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;any solution?&lt;/P&gt;</description>
      <pubDate>Tue, 08 Oct 2019 10:57:23 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9072859#M135048</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2019-10-08T10:57:23Z</dc:date>
    </item>
    <item>
      <title>Re: nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9073312#M135049</link>
      <description>&lt;P&gt;After many failed attempts to resolve this issue, I reinstalled fresh copy of Windows (now 10 Pro, it was 7 Pro, if that makes any difference, legit both), and now everything works perfect.&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Tue, 08 Oct 2019 13:41:27 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9073312#M135049</guid>
      <dc:creator>Nikola_Perunmoto</dc:creator>
      <dc:date>2019-10-08T13:41:27Z</dc:date>
    </item>
    <item>
      <title>Re: nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9073337#M135050</link>
      <description>&lt;P&gt;i know that fresh system will install it without problems, but i can not change or reinstall system on my machine...&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;it seems imposible that there is no fix for this....&lt;/P&gt;</description>
      <pubDate>Tue, 08 Oct 2019 13:45:46 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9073337#M135050</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2019-10-08T13:45:46Z</dc:date>
    </item>
    <item>
      <title>Re: nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9084632#M135051</link>
      <description>&lt;P&gt;Same here. I'm running Windows 10 Pro and I just downloaded Fusion 360 and I'm getting this error. Reinstalling windows is not an option in my case.&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Mon, 14 Oct 2019 09:38:59 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9084632#M135051</guid>
      <dc:creator>siklosi</dc:creator>
      <dc:date>2019-10-14T09:38:59Z</dc:date>
    </item>
    <item>
      <title>Re: nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9094103#M135052</link>
      <description>&lt;P&gt;The same problem! I am using Windows 10 Enterprise. I have tried all the published solutions and nothing works. It all started with note that Fusion can't updating, to the point where I couldn't load the last drawings. I uninstalled the Fusion 360 manually because automatic uninstall didn't work for same problem. After that, a new installation is impossible! Unfortunately, I have a lot of purchased software that, if I reinstall Windows, will ask to buy them again. I am constantly looks for solution.&lt;/P&gt;&lt;P&gt;Regards&lt;/P&gt;&lt;P&gt;Dusan&lt;/P&gt;</description>
      <pubDate>Fri, 18 Oct 2019 08:09:49 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9094103#M135052</guid>
      <dc:creator>dhadzi</dc:creator>
      <dc:date>2019-10-18T08:09:49Z</dc:date>
    </item>
    <item>
      <title>Re: nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9095193#M135053</link>
      <description>&lt;P&gt;Can you try to run as an admin?&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Fri, 18 Oct 2019 16:23:09 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9095193#M135053</guid>
      <dc:creator>ryan.bales</dc:creator>
      <dc:date>2019-10-18T16:23:09Z</dc:date>
    </item>
    <item>
      <title>Re: nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9095346#M135054</link>
      <description>&lt;P&gt;Hi,&lt;/P&gt;&lt;P&gt;I wrote: "I have tried all the published solutions and nothing works".&lt;/P&gt;&lt;P&gt;Does anyone have some proposal or what information should be sent for a solution rather than ask such a simple question and consider that is a reply.&lt;/P&gt;&lt;P&gt;Regards&lt;/P&gt;&lt;P&gt;Dusan&lt;/P&gt;</description>
      <pubDate>Fri, 18 Oct 2019 17:38:27 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9095346#M135054</guid>
      <dc:creator>dhadzi</dc:creator>
      <dc:date>2019-10-18T17:38:27Z</dc:date>
    </item>
    <item>
      <title>Re: nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9096025#M135055</link>
      <description>&lt;P&gt;yes tried all methods, even creating new account on widows, run it as admin or no admin it is always the same...&lt;/P&gt;</description>
      <pubDate>Sat, 19 Oct 2019 06:41:05 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9096025#M135055</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2019-10-19T06:41:05Z</dc:date>
    </item>
    <item>
      <title>Re: nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9122455#M135056</link>
      <description>&lt;P&gt;I found root of problem in my case and solved it. I just downloaded new installer and it looks that it's a bit more descriptive so I found that it's throwing following errors:&lt;/P&gt;&lt;PRE&gt;  File "D:\3P\PYTHON\3.7.3\win64\lib\ssl.py", line 578, in create_default_context
  File "D:\3P\PYTHON\3.7.3\win64\lib\ssl.py", line 479, in load_default_certs
  File "D:\3P\PYTHON\3.7.3\win64\lib\ssl.py", line 471, in _load_windows_store_certs&lt;/PRE&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;I started googling as it looks like general python problem and found following post:&lt;/P&gt;&lt;P&gt;&lt;A href="https://bugs.python.org/issue35665" target="_blank"&gt;https://bugs.python.org/issue35665&lt;/A&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;I immediately realized that this is problem since I'm from Serbia and I have installed on my notebook software for reading Serbian ID cards. It seems that like everything in this country certificates issued by Ministry of Internal Affairs are messed up&amp;nbsp;&lt;/P&gt;&lt;P&gt;Solution was to open&amp;nbsp; certmgr search for MUP and delete all their certificates. As soon as I did this Fusion 360 installed like charm.&amp;nbsp;&lt;/P&gt;&lt;P&gt;I hope this will help to some of you.&lt;/P&gt;</description>
      <pubDate>Fri, 01 Nov 2019 17:06:35 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9122455#M135056</guid>
      <dc:creator>siklosi</dc:creator>
      <dc:date>2019-11-01T17:06:35Z</dc:date>
    </item>
    <item>
      <title>Re: nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9148805#M135057</link>
      <description>&lt;P&gt;Hi, it works!!!&lt;/P&gt;</description>
      <pubDate>Fri, 15 Nov 2019 12:36:58 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9148805#M135057</guid>
      <dc:creator>dhadzi</dc:creator>
      <dc:date>2019-11-15T12:36:58Z</dc:date>
    </item>
    <item>
      <title>Re: nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9149357#M135058</link>
      <description>&lt;P&gt;wow you sir are lifesaver&lt;/P&gt;</description>
      <pubDate>Fri, 15 Nov 2019 16:20:53 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9149357#M135058</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2019-11-15T16:20:53Z</dc:date>
    </item>
    <item>
      <title>Re: nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9150722#M135059</link>
      <description>&lt;P&gt;Dude you're an angel!&lt;/P&gt;</description>
      <pubDate>Sat, 16 Nov 2019 16:46:44 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9150722#M135059</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2019-11-16T16:46:44Z</dc:date>
    </item>
    <item>
      <title>Re: nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9192201#M135060</link>
      <description>&lt;P&gt;Works for me, MUP certificates were the issue.&lt;/P&gt;</description>
      <pubDate>Mon, 09 Dec 2019 23:42:59 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9192201#M135060</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2019-12-09T23:42:59Z</dc:date>
    </item>
    <item>
      <title>Re: nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9251987#M135061</link>
      <description>&lt;P&gt;Setting Up MUP certificates to work is pain in the **** and I am reluctant to delete them and go through that installation hell again.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;A hope Autodesk will sort out python bug soon.&lt;/P&gt;</description>
      <pubDate>Wed, 15 Jan 2020 12:15:22 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9251987#M135061</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2020-01-15T12:15:22Z</dc:date>
    </item>
    <item>
      <title>Re: nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9274662#M135062</link>
      <description>&lt;P&gt;I'm also from Serbia, i got this error from totally different use case. I'm python&amp;nbsp; / java developer and was developing software that use to work perfectly yesterday. And today i started receiving same exact "&lt;SPAN&gt;nested asn1 error&lt;/SPAN&gt;". I knew that its not something i did by coding but i could not figure out what and why until i read your answer. Yesterday evening i installed "Serbian ID card software knows as CELIK" . So when i uninstalled it, everything worked perfectly again. I had to reset my password here just to reply to you and say one big THANKS!&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;ZIV BIO ! (bless you!)&lt;/P&gt;</description>
      <pubDate>Sat, 25 Jan 2020 23:04:04 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9274662#M135062</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2020-01-25T23:04:04Z</dc:date>
    </item>
    <item>
      <title>Re: nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9434004#M135063</link>
      <description>&lt;P&gt;Interesting... I'm also from Serbia and application Celik is installed on my PC, installation of Fusion was successful only after I removed Celik app... So that was the problem... Thank you all for directions how to solve this problem... &lt;span class="lia-unicode-emoji" title=":winking_face:"&gt;😉&lt;/span&gt; Cheers...&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Fri, 10 Apr 2020 07:54:51 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9434004#M135063</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2020-04-10T07:54:51Z</dc:date>
    </item>
    <item>
      <title>Re: nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9443742#M135064</link>
      <description>&lt;P&gt;Koji tacno sertifikati trebaju da se obrisu?&lt;/P&gt;&lt;P&gt;Ne mogu da se snadjem ovde.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Pozdrav&lt;/P&gt;</description>
      <pubDate>Wed, 15 Apr 2020 05:45:05 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9443742#M135064</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2020-04-15T05:45:05Z</dc:date>
    </item>
    <item>
      <title>Re: nested asn1 error (_ssl.c:3947)</title>
      <link>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9885537#M135065</link>
      <description>&lt;P&gt;Truly lifesaver. I uninstalled CELIK and CitacSaobracajne and all is working fine now &lt;span class="lia-unicode-emoji" title=":winking_face:"&gt;😉&lt;/span&gt;&lt;/P&gt;</description>
      <pubDate>Sat, 21 Nov 2020 12:38:27 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/fusion-support-forum/nested-asn1-error-ssl-c-3947/m-p/9885537#M135065</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2020-11-21T12:38:27Z</dc:date>
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