Sergey:

I have the code below in the Load Event and Init Event of the Form holding the Grid.

IF USED("prodlist")
ELSE
    USE PRODLIST IN 0
ENDIF
SELECT PRODLIST

The same data file is established in the Data Environment and in the Grid itself. I have rechecked each column of the Grid and the data references are all to valid fields of PRODLIST.

In the properties of the DataEnvironment I have AutoOpenTables = .t.

The only things that stand out in the DataEnvironment Properties are:
DataSource = .NULL.
DataSourceType = none

I have gone through the Help Notes on these 2 items and I can make no sense of them.

Does any of this clarify what could be causing this?

Mike Smith