Hi Greg ! Thanks for the quick answer. I am using the 7720 parent version but I keep it up-to-date without any problems. Enclosed you'll find the 'paster.log' file generated when I start Galaxy and try to access the manage installed tool shed repositories page. Cheers, Mathieu Bahin ----- Mail original ----- De: "Greg Von Kuster" <greg@bx.psu.edu> À: "Mathieu Bahin" <mathieu.bahin@irisa.fr> Cc: galaxy-dev@bx.psu.edu Envoyé: Vendredi 9 Novembre 2012 19:28:09 Objet: Re: [galaxy-dev] Bug report : JSONDecodeError Hello Mathieu, What version of Galaxy are you running? Also, I cannot read the stack trace from your pasted image, so can you send a text version of the complete stack trace from your paster log? Thanks, Greg Von Kuster On Nov 9, 2012, at 11:26 AM, Mathieu Bahin wrote: <blockquote> Hi, I am using my own Galaxy instance and I had a problem removing a tool from the tool shed : mothur. The installation was ok and I the mothur tool running without any problem. But when I tried to uninstall the tool, I get an error (screenshot enclosed). And I get the same every time I try to go on the 'Manage tool shed repositories' in the Admin panel. I have tried to rebuilt the eggs and to restart Galaxy basically. Actually, I don't really understand the error message. Cheers, Mathieu Bahin <07.png> ___________________________________________________________ Please keep all replies on the list by using "reply all" in your mail client. To manage your subscriptions to this and other Galaxy lists, please use the interface at: http://lists.bx.psu.edu/ </blockquote>