I am running ACCESS 32 bit  and SQL Server 64 bit

That's all it says, OBDC Call error.  there is no error number, nothing.  It has to be my connection string, obviously not correct.

Upgraded to Access 2016 (Not 365) connected to SQL Server 2019.  I am able to link my tables, but when attempting to to open a Form, i receive an OBDC...

I have a lot of work ahead of myself. There are several tables that have this issue. Gotta love Microsoft!:crazy:

Access 2013 is the GUI front end. A lot of VB is used.

Based on my current BigInt values, I think I will be okay. Thanks for your reply.:-)