Here's another game of whats-wrong-with-my-code
If a record has been deleted the Grid disappears after this code:

*** COMMAND3.CLICK UPDATE
Set Safety Off
nAnswer= 0
. blah . blah . blah
Select ModiComm
Set Order To Grpid
Go Top
ThisForm.Command4.Enabled= .T.
ThisForm.grdModicomm.Visible = .F.
PACK
ThisForm.grdModicomm.Visible = .T.
ThisForm.grdModicomm.ReadOnly=.T.
ThisForm.grdModicomm.Refresh
Set Safety On

Edits and adds don't have this problem, What's Up?