Hi Fabio
Try this

release x
x=sys(1104)
? x
?type(x)

On my VFP8 SP1 it returns N
regards

>Hi,
>
>on SYS(1104) - Purge Memory Cache help session is writed:
>
>Returns
>  Numeric. 0, if successful
>
>This is incorrect.
>
>Correct is:
>Returns
>   String. "0", if successful
>
>
>Question ?
>
>If return <>"0",
>- the return string number is the residual unpurged ?
>
>- what i do ? QUIT ?
>
>Fabio