Yum, don’t you love obscure error messages. The following page claims there is a binary incompatibility between Python 2.7.3 and 2.7.5 which could trigger such an error message, and I wonder if your packages have a mix of Python versions (the system Shiboken library seems to be 2.7.1)??? http://lists.qt-project.org/pipermail/pyside/2013-September/001572.html <http://lists.qt-project.org/pipermail/pyside/2013-September/001572.html> Wayne > On 6 Jul 2016, at 13:44, Brigitte Fiege <[log in to unmask]> wrote: > > Symbol not found: __PyTrash_thread_deposit_object