structure_sync not working I am trying to use structure_sync within my Drupal 8.4.4 project to export the block content of custom blocks as a configuration (see also the discussion "Custom blocks cannot be properly exported and imported").

Installation via composer went fine and the module also reports everything goes fine when trying the export-blocks function for example:

$ drush export-blocks
Exporting blocks...
Exported "Copyright"                                          [ok]
Exported "Social Links"                                       [ok]
Exported "Flyout"                                             [ok]
Successfully exported blocks                                  [ok]
The custom blocks have been successfully exported.            [status]


However, no configuration files were actually created in the sync_dir (or elsewhere).

Is there some other undocumented pre-requisite?
It is not well explained in the documentation, but structure_sync works by generating a new configuration item with all the exported content. It does not generate new files by itself. 

Later, when you export the configuration, the new config item appears.