>>
>>There's nothing to document. UDF in a query cannot make any assumption about what the current work area is or what current record pointer is. It's your problem if you use UDF this way not VFP.
>>
>
>1. I don't have problems

Doesn't look this way from your post.

>2. Of course RECNO() is for explain the bug only.

There' no bug here so there's nothing to explain. Using RECNO() incorrectly doesn't help either.

>3. It is not this the point ( WA,RECNO), the point it is: when it is called an UDF?

You cannot make any assumption about that either.

>4. Then because those of the VFPT have wasted time to change this behavior?

It's pure speculation on your part.