>Hi David,
>
>The problem it not this.
>
>To me it does not interest the value of lnDiff, it origin, ....
>
>My interest is this:
>
>

>i have two variable, equal value, equal type, apply a deterministic
>function and get a not deterministic result !
>

>
>Any programming enviroment that do this is bad.
>

Fabio,

You are completely incorrect.

First, it clearly states in the VFP help that precision is limited to 15 digits.

Second, it also states that the cause of this is a limitation with Pentium class processor and follows IEEE standards.

Third, this limitation is not limited to VFP. See MSKB#78113.