recover local_db.bin

using App Engine and Java I decided to delete the local datastore located in local_db.bin as I had made some changes to class models contained in it. Mistake! Such local_db file is not created anymore, running the app I get "The backing store, G:\workspace\test\war\WEB-INF\appengine-开发者_如何学运维generated\local_db.bin, does not exist. It will be created."

but it isn´t. The app runs smoothly time after time and the database is never created (I tried stopping the jetty server and even closing Eclipse).

Any idea? (otherwise I guess I´ll create a new project and migrate the code).

The file is created when data is persisted, but not necessary direct. I deleted my version as a test. Persisted some data. at which point the same message you got was shown. And after some time I got this message: Time to persist datastore: 37 ms. (When deleting the local_db.bin I also deleted the datastore-indexes-auto.xml).