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Drupal 7 to 9 migration fails with ‘missing migrations’ errors using UI

I am trying to migrate a Drupal 7 site to Drupal 9 using the Migrate Drupal UI. I have read through and followed the corresponding tutorials on drupal.org but migration fails.

Given that my original Drupal 7 site is quite complex, for testing purposes, I created a fresh installation of Drupal 7 and created some dummy content of the content type Article, then I ran the upgrade from the UI in Drupal 9.

The ‘What will be upgraded?’ page indicated that 29 modules would be upgraded (including Node). After performing the upgrade, I got the following messages:

  • ‘Completed 39 upgrade tasks successfully’
  • ’40 upgrades failed’
  • ‘Upgrade process not completed’
  • and no content from the Drupal 7 site got migrated

When I checked the upgrade log, for example, for the Article content type, I found the following error:

  • ‘Migration d7_node:article did not meet the requirements. Missing migrations d7_node_type, d7_user. requirements: d7_node_type. requirements: d7_user.’

The d7_node_type.yml and d7_user.yml migration files are there in the appropriate Drupal 9 folders, so I don’t understand what the problem is. What am I missing here?

This article was republished from its original source.
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Drupal 7 to 9 migration fails with ‘missing migrations’ errors using UI

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