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I recently upgraded my linux (debian). Since then I Mendeley is not working: it starts and after a couple of seconds starts fetching and crashes immediately.

This is the error message that it is giving:

Qt WebEngine Plugins directory not found. Trying fallback directory... Plugins as for example video codecs MAY NOT work.

I tried to uninstall mendeleydesktop and install it again, but still the same problem. Any suggestions?

aLbAc
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  • This seems like a question for unix.stackexchange.com or superuser.com. – hyde Oct 24 '16 at 15:08
  • I can tell you that this error message appears even when Mendeley Desktop is running and syncing normally. If you post another question on superuser.com with a fuller list of which version of Debian and Mendeley you are using, and any further error output, I can have a go at troubleshooting it. – selkie222 Oct 28 '16 at 09:26
  • The version 1.17 is not working for me. I installed a previous version (1.16.3) and it works. – aLbAc Jan 05 '18 at 15:47

2 Answers2

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I think I got the same problem. 

Qt WebEngine Plugins directory not found. Trying fallback directory... Plugins as for example video codecs MAY NOT work.
Error in finalize query "attempt to write a readonly database" : "BEGIN EXCLUSIVE"
Error in open database "unable to open database file" : "/home/user/.local/share/data/Mendeley Ltd./Mendeley Desktop/www.mendeley.com/user@mail.com-f453/search-index.sqlite"
Failed to open search index
Error in prepare query "unable to open database file" : "SELECT value FROM UpdateTokens WHERE key = :key"
Error in bind value "no statement prepared"
Error in execute query "query not prepared"
Error in step query "query not active"
QObject::disconnect: Unexpected null parameter

The problem, I think, was that the folder where my mendeley database is stored changed its name (don't really know why). To solve I just erased the folder /home/user/.local/share/Mendeley Ltd. and start mendeleydesktop again so the folder is created again (your papers will have to be sync again).

niklai
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  • I did it and the folder was created again. However it doesn't seem to solve the problem for me. – aLbAc Feb 06 '17 at 14:21
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Had the same problem on Fedora 25 and Mendeley 1.17 Reverted back to Mendeley 1.16.3 and it works again.

user23413
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  • Unfortunatelly I can only find the latest version of Mendeley, any clues where I can get the older version? – aLbAc Feb 06 '17 at 14:17
  • I found in my local folder a copy of an older version of Mendeley and it works. So quite likely there is some bug in the latest version. – aLbAc Feb 16 '17 at 14:00
  • Update: switched to Zotero since Mendeley support for linux is lacking. – user23413 Oct 02 '18 at 14:34