I have a vb development machine that has access 2010 install on it. I have a project that uses the access database and the database has a accdb extension. I compiled my program and copied the access db over to a pad, and install my program everything is good. Then I go to get his data back to my development to test a few things with current data, and it will to copy. Is that what they mean by accdb will not replicate. I have a window8 machine that is also used for development and when I run the program on that machine the database comes back and says its a invalid format. Can I get the data from accdb and move it to a mdb.