User warning: The following module is missing from the file system: node_reference. For information about how to fix this, see the documentation page. in trigger_error() (line 1138 of /[localdevetc/drupalrootetc]/docroot/includes/bootstrap.inc). =>
This error usually occurs when module files are removed without a module being disabled and uninstalled first. Typically it's corrected by simply re-downloading the module files and then uninstalling it. The problem is that there doesn't seem to be a module called node_reference for Drupal 7. I tried
drush dl node_reference and got:
No release history was found for the requested project (node_reference).
Could not download requested project(s).