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<p>Hi Ajunk,</p>
<p>This is because you are running mpm_event Apache module rather than mpm_prefork.&nbsp; I believe you can still switch this over on Ubuntu 18.04 with:</p>
<p>a2dismod mpm_event</p>
<p>a2enmod mpm_prefork</p>
<p>There was issues with EPrints running on Apache using mpm_event.&nbsp; I have previously posted on this list asking people to try out EPrints (later 3.3.x version) on Ubuntu 16.04 and Ubuntu 18.04 using mpm_event not mpm_prefork to see if they see any issue,
 after removing the unrequired deb package (libxml-libxslt-perl) which caused segmentation faults when used with mpm_event.&nbsp; Unfortunately, I never got any feedback at the time, so I decided to retain the message until I was confident this problem was the reason
 behind the message originally being added.<br>
</p>
<p>That all said,&nbsp; the threads message is only a notice warning you that you might have issue not actually something preventing Apache from restarting.&nbsp; The issue is that you do not have the version number set.&nbsp; This can be fixed by copying perl_lib/EPrints/SystemSettings.pm.tmpl
 to perl_lib/EPrints/SystemSettings.pm.&nbsp; I think this would normally happen if you were create a new archive from scratch using the &quot;epadmin create&quot; command but if you are upgrading then it will not.&nbsp; You may need to merge some config options from your old
 (3.3.12) SystemSettings.pm if you modified this for some reason, (e.g. setting a specific SMTP server to use to send emails through).&nbsp; Otherwise, just copying the .tmpl file across should be sufficient.<br>
</p>
<p>Regards</p>
<p>David Newman<br>
</p>
<div class="moz-cite-prefix">On 30/01/2019 23:39, Ajunk Pracetio via Eprints-tech wrote:<br>
</div>
<blockquote type="cite" cite="mid:EMEW3|611c03692e91838a2b8e7551bbb02e51v0YNeK14eprints-tech-bounces|ecs.soton.ac.uk|CACOEPmOhRGurMpZjRXOFXgW2e=aX2xXpoR9naeC=TJmOfA2nMw@mail.gmail.com">
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<div><span class="gmail-tlid-translation gmail-translation">Hi,</span></div>
<div><span class="gmail-tlid-translation gmail-translation"><br>
</span></div>
<div><span class="gmail-tlid-translation gmail-translation">I just installed eprints 3.3.16 on Ubuntu 18.04 LTS. Then, I put the archives folder from my old eprints (version 3.3.12) to the location /usr/share/eprints/ archives</span></div>
<span class="gmail-tlid-translation gmail-translation"><br>
I have imported a database of previous eprints into the new database. the problem is, when I restart Apache2, an error appears as follows:<br>
</span>
<div><span class="gmail-tlid-translation gmail-translation"><br>
</span></div>
[Thu Jan 31 06:25:22.987237 2019] [perl:notice] [pid 11821:tid 140559951174592] Warning! Running EPrints under threads is experimental and liable to break<br>
[Thu Jan 31 06:25:23.551255 2019] [perl:error] [pid 11821:tid 140559951174592] Invalid version format (negative version number) at (eval 509) line 1, near &quot;package EPrints::Config::myrepo&quot;\nsyntax error at (eval 509) line 1, near &quot;package EPrints::Config::myrepo-&quot;\nBEGIN
 not safe after errors--compilation aborted at (eval 509) line 2.\n</div>
<div><span class="gmail-tlid-translation gmail-translation"><br>
I've searched Google and haven't found a solution. Can anyone help with this case? I am surprised that there is a description of &quot;Running EPrints under threads is experimental and liable to break&quot;.<br>
<br>
thank you<br>
<br>
</span></div>
<div>Best regards,</div>
<div>Agung Prasetyo W.<br>
</div>
<div>-- <br>
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<div>Life isn't valuable if you don't have someone to care<br>
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