Because it's read only. See help for DBGETPROP() function.

>Hi all
>
>I just tried the following command:
>

DBSetProp(lcViewName, 'view', 'SQL',lcSQL)

>
>where lcSQL is the modified view SQL. I got the message that the property is read-only.
>
>Why is this so?
>Also the view I am trying to update is a remote view.
>
>Please advise.