<div dir="ltr">Should be fixed now. </div><div class="gmail_extra"> <div class="gmail_quote">On Wed, Mar 30, 2016 at 5:51 PM, Markus Seeber <<a href="mailto:markus.seeber@spectralbird.de" target="_blank">markus.seeber@spectralbird.de</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">After just checking out jack1 from GitHub and trying to initialize the git submodules for headers, example-clients and tools I received the following error: $ git submodule update --init fatal: reference is not a tree: e74323c535876abca9a2293bd2ca426a3b91ff8b fatal: reference is not a tree: a2536c8b348bbfb21ec53db901e7992d7ffef474 fatal: reference is not a tree: 8e140b72de0231d129c6006db969f1dba4f1486b Unable to checkout 'e74323c535876abca9a2293bd2ca426a3b91ff8b' in submodule path 'example-clients' Unable to checkout 'a2536c8b348bbfb21ec53db901e7992d7ffef474' in submodule path 'jack' Unable to checkout '8e140b72de0231d129c6006db969f1dba4f1486b' in submodule path 'tools' After checking the referenced submodules, I found that the referenced commits _do not exist_ in the tree of these 3 repositories. The last change to the submodules was: > commit c758cdf4f6e959b92683f2dba6ce8617ac4f0a83 > Date: Tue Feb 23 10:15:45 2016 -0500 Which introduced many changes. What happened here? Are there pending commits of these 3 repositorys that are not yet public or was there a rebase in these so that the history got rewritten? For the time being, I assume it is safe to assume that HEAD of master is a valid commit to check out? Best regards Markus </blockquote></div> </div>