Hi Stephane,

It's VFP limitation documented under Visual FoxPro System Capacities in help:

Minimum value of an integer -2,147,483,647 
Maximum value of an integer  2,147,483,647

>There is a compatibility issue with VFP and SQL Server.
>
>An Integer max and min values in VFP is from -2,147,483,647 through 2,147,483,647
>
>And in SQL Server from -2,147,483,648 through 2,147,483,647
>
>This can cause a problem when storing a value of -2,147,483,648 in SQL Server and attempting to use it in VFP.
>
>This compatibility issue was present in VFP8 and is still there in VFP9 Beta.