"skip_process_on_empty" plugin does not exist I'm trying to migrate entities from a D7 to a D8 site using this tut: http://www.metaltoad.com/blog/migrating-taxonomy-drupal-7-to-drupal-8

When I execute the migration I get the error:


  The "skip_process_on_empty" plugin does not exist.


And then it just hangs.

I have this in my migrate yml file:

parent:
    -
      plugin: skip_process_on_empty
      source: parent
    -
      plugin: migration
      migration: custom_taxonomy_term


I tried changing it to skip_row_on_empty but get the same error regarding "skip_process_on_empty".

Here's the contents of [mymodule]/config/install/migrate.migration.custom_taxonomy_term.yml

id: custom_taxonomy_term
label: Drupal 7 taxonomy terms
dependencies:
  enforced:
    module:
      - monster_migrate_7
migration_groups:
  - Drupal 7
source:
  plugin: custom_taxonomy_term
process:
  tid: tid
  vid:
    plugin: migration
    migration: custom_taxonomy_vocabulary
    source: vid
  name: name
  description: description
  weight: weight
  parent:
    -
      plugin: skip_on_empty  &lt;--changed this per suggestion
      method: process
      source: parent
    -
      plugin: migration
      migration: custom_taxonomy_term
  changed: timestamp
destination:
  plugin: entity:taxonomy_term
migration_dependencies:
  required:
    - custom_taxonomy_vocabulary


And here's what I get when I try to execute it:

&gt; drush migrate-manifest sites/all/modules/monster_migrate_7/manifest.yml --legacy-db-url=mysql://[user]:[pass]@localhost/monster
Running custom_taxonomy_vocabulary                                                                                                                                                    [ok]
Processed 0 items (0 created, 0 updated, 0 failed, 0 ignored) - done with 'custom_taxonomy_vocabulary'                                                                                [status]
Running custom_taxonomy_term                                                                                                                                                          [ok]
The "skip_process_on_empty" plugin does not exist.                                                                                                                                    [error]
&gt;
skip_process_on_empty and skip_row_on_empty were combined into a single plugin. Try this:

plugin: skip_on_empty
method: process


To skip a row:

plugin: skip_on_empty
method: row


Hope this helps!