Error: Cannot create a feature class in the selected feature dataset
When attempting to create a new feature class within an existing feature dataset using ArcCatalog, you may receive the following error message:
Cannot create a feature class in the selected feature dataset because the feature dataset is in use by another application/user.
Lock request conflicts with an established lock [layer].
This error occurs when a layer from the feature dataset is being accessed in ArcMap at the same time a new feature class is being created inside the feature dataset using ArcCatalog.
Solution or Workaround
- Remove all layers from ArcMap that are part of the feature dataset.
- Create the new feature class in ArcCatalog.