vb.net - Unrecognised database format exception

Question

I have already successfully connect my programs to my database.
Then I edit my database in Access, and after that when running my program, I get an error notice that UNRECOGNISED DATABASE FORMAT.

Then I try to make new database and connect to vb.net but it failed again.
I don't know where the fault is because I didn't change anything in my code.
I already use provider Microsoft.ACE.OLEDB.12.0 and file extension in .accdb format.

Answer 1

第一种可能性：数据库可能已损坏。尝试紧凑和修复。

第二种可能性：无意中更改了数据库格式，如果是这种情况，您始终可以“另存为”较低版本，例如 2003 或 2010。