I have an issue with Eclipse and Subversive.

I'm trying to reintegrate a branch of a project into the trunk.

These are the operations that I'm following:

1. Switch to the trunk version of the project
2. I have ensured that there were no any pending operations, doing a Revert and an Update, in order to start from a "clean" working copy, perfectly synchronized with the remote copy of the trunk
3. I go to "Team -> Merge ..."
4. I go to the "Reintegrate" tab, and I choose the branch that I want to merge within the trunk, pointing at "Head revision" of the branch.
5. I press the OK button, but this is the error that I obtain:

---

```
 Merge operation failed.
Can't overwrite cause with org.tmatesoft.svn.core.SVNException: svn: E195016:
Cannot merge into a working copy with a switched subtree

```

I don't understand what's wrong.

I'm using this Eclipse and SVN configuration:

```
Eclipse Java EE IDE for Web Developers.
Version: Neon.1 Release (4.6.1)
Build id: 20160913-0900

Subversive SVN Team Provider    4.0.3.I20161129-1700    

SVNKit 1.8.14 Implementation (Optional) 6.0.3.I20161124-1700

SVN 1.9

```

Thanks in advance.