See my updated message.

>No property 'sparse' to grid - only to the grid column and the default is :sparse=.t.
>
>>

yourgrid.setall('sparse',.T.'column')

>>
>>>No error message, but no any changr in thr grid color.
>>>>>Hi
>>>>>Why do I get the expression invalid error message?
>>>>>

cgship=substr(othernr.shipmentid,3,3)
>>>>>
>>>>>thisform.grdnrother.shipment.dynamicbackcolor= [IIF(alltrim(cgship)='G',rgb(255,0,0),RGB(255,255,255))]

>>>>
>>>>
>>>>because cgship is going out of scope. try:
>>>>

>>>>cgship=[ALLTRIM(substr(othernr.shipmentid,3,3))]
>>>>thisform.grdnrother.shipment.dynamicbackcolor= [IIF(]+cgship+[='G',rgb(255,0,0),RGB(255,255,255))]
>>>>