>Hi,
>got a strange one at a client's site today.
>
>SQL Server 2016 installed on a Windows Server 2016.
>My VFP app was successfully connecting using SQL Server Native Client 10.
>The client turned off TLS 1.0 and 1.0 on the server and then my VFP app stopped connecting.
>
>We uninstalled Native Client 10.
>
>I changed the connection string to use SQL Native Client 11.0 and {ODBC Driver 17 for SQL Server} and got this error:
>
>"Connectivity error: [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified"
>
>I am able to connect using the ODBC applet on the server with both of these drivers.
>
>I am able to connect from a workstation using both those drivers.
>
>I have no idea what could be causing this so would appreciate any suggestions

Check if you have these ODBC drivers installed ODBC 32 bit.