delete portal notice

With a couple of views I am now getting the following message when I
open the view with pgaccess.  Thereafter, the connection to the backend
is lost.

	NOTICE:  trying to delete portal name that does not exist.

Can anyone help me understand what this means?  I'm baffled, because I
have other views constructed in essentially similar ways that perform
fine.

Thanks alot.

Cheers,
Brook