As someone said, the problem may lie in the fact you're using this in your expression. What this is referring to?

Try to provide the whole reference to the grid including the form, e.g.

if (myAlias.myID <> 0 and thisform.myGrid.... , onecolor, anothercolor)

Or better have it as a separate form's method.

>Hi Cetin
>
>>What is your expression? I don't use GH but expression might ring bells.
>
>Does not look pretty to me :)
>

IIF((NOT EMPTY(iID)) AND (THIS.coldemaildt.ENABLED AND (NOT THIS.coldemaildt.READONLY)), goApp.nBackColorFld, goApp.nBackColorForm)

>
>iID = 11
>Enabled = .T.
>Readonly = .T.
>nBackColorFld = 13165780
>nBackColorForm = 13160660
>
>Thanks for responding.