Microsoft.ACE.OLEDB.12.0 bug in multithread scenario

Question

I use in my x64 application the Microsoft Access Database Engine 2010 (part of Microsoft Office 2016) for working with mdb files. But, current version of Microsoft Access Da

Answer 1

We too have encountered this issue in a multi-threaded VB.Net (Framework v4.5.2) service application. After much testing, the only way we found to resolve this was to either use a single thread or turn off connection pooling (using OLE DB Services=-2). In the end we have gone with the latter as we needed the system to be able to process requests in parallel.

FYI, the version of Office 2016 I have installed does not include this driver (hence why our program passed any kind of basic testing) but it was included with the version of Office 2016 that our customer installed. So far I have checked "Microsoft Office Professional Plus 2016" (from both MSDN and MS Partner Network) and "Microsoft Office 365 ProPlus" and none of them appear to come with the Microsoft.ACE.OLEDB.12.0 OLEDB provider. Also, as far as I can see, the only version of the Microsoft Access Database Engine 2010 Redistributable available to download is SP2 (released 22/07/2013) so it is hard to get this tested in a development environment!