MS-Access split database errors

There seem to be two prevelant errors if you use the database splitter. One claims the file is locked the other is an object out of bounds type error. 

I found it necessary to do this manually:

1. make a copy of the db rename it to name_be.accdb. This is the new back end or ‘be’ db.

2. delete all non table objects there

3.  link from the source db to the new back end db.

Who needs a database splitter wizard anyway.