I recently had an 'rm -rf' related mishap in my home directory ( Ubuntu 14.04 installation ).
Vim ( v 7.4.52 ) and the add-on package 'vim-youcompleteme' had been installed prior to the mishap and worked perfectly .
After recovering from my goof-up, I noticed that the completion features from 'vim-youcompleteme' no longer seemed to be working.
I tried complete removal of the package ( apt-get purge vim-youcompleteme ) and subsequent re-installation, hoping that this would reinstate the aforementioned add-on package and its capabilities. This didn't help.
I suspect something in the resource / settings data must have gotten corrupted.
I am hoping for suggestions that would lead to the resurrection of the completion feature for Vim.
Many thanks in advance!