Hi, we've Alfresco Community Edition 201803 EA installed where we've a custom content model which consists of some custom doc types and custom properties. We've deleted all the contents from repository and from trashcan but while trying to deactivate the model still getting the error stating the model is in use. I'm not getting any proper resolution yet.
Are you sure you have deleted everything using that model? Did you check by doing transactional metadata queries (CMIS/FTS search against database). This error will only pop up if Alfresco still finds any node in the DB using the model, so I am quite confident that you missed something in your deletions.