I get an error message when connecting to an access database

In vb.net, 2015- when I connect to an access database, with the following code:

Dim StnStr() As String
        StnStr = "Data Source=servername; Initial Catalog=databasename; User ID=userid; Password=password"
        StnStr = "Provider=MSDataShape;Data Provider=Microsoft.Jet.OLEDB.4.0;"
        StnStr = StnStr & "Jet OLEDB:System database=" & My.Application.Info.DirectoryPath & "\System.mdw;"
        StnStr = StnStr & "Password=PW;User ID=USERNAME;"
        StnStr = StnStr & "Data Source=" & My.Application.Info.DirectoryPath & "\data.mdb;"
        StnStr = StnStr & "Persist Security Info=False"

 Dim CON As New OleDb.OleDbConnection(StnStr)
       CON.Open()


I receive the following error message in the output window:

The program '[3660] UpdateCrgs.vshost.exe' has exited with code -1073741819 (0xc0000005) 'Access violation'.
What can this mean?
In other projects it seems fine, why in this project am I getting this message?