I assume this is not an event script?  and only part of the script is here.  Have you declared oLines as an object?

When you open oLines from an open SO it should already be filtered to the correct lines.  If you MoveFirst, does it load a line from the correct SO?

Set oLines = oSession.AsObject(oBusObj.Lines)
retVal = oLines.MoveFirst()
do until oLines.EoF 
	' do stuff…
	retVal = oLines.MoveNext()
loop ' oLines

Correct, not an event script... Yes, i have declared the oLines as an object.

Here is the code where i instantiate the objects...

' Instantiate a Sales Order business object
oSEC = oSS.nSetProgram(oSS.nLookupTask("SO_SalesOrder_ui"))
Set o = oScript.NewObject("SO_SalesOrder_bus", oSS)
Set oLines = oScript.NewObject("SO_SalesOrder_bus", oSS)

' Instantiate a Sales Order Invoice business object
oSEC = oSS.nSetProgram(oSS.nLookupTask("SO_Invoice_ui"))
Set oInv = oScript.NewObject("SO_Invoice_bus", oSS)

Regards,

Manuel

Your line seen below is not getting an object handle to the detail/lines object since you are specifying the header object with SO_SalesOrder_bus.

Set oLines = oScript.NewObject("SO_SalesOrder_bus", oSS)

You should be using the following.

Set oLines = o.oLines

As David Speck said, in your example above 'o' and 'oLines' are different instances of the same SO_SalesOrder_bus class.

I tried both... same result.

What's the retVal on the oLines.MoveFirst()?

Are you getting a hard error or a zero returned by the SetKeyValue?

I can't say I recall ever trying to use SetKeyValue and SetKey/Find on a detail object, I usually use the EditLine or GetResultSets.

I've tried,

retVal = oLines.nMoveFirst()

and

retVal = o.oLines.nMoveFirst()

Same error, now in method MOVEFIRST, below are the objects..

' Instantiate a Sales Order business object
oSEC = oSS.nSetProgram(oSS.nLookupTask("SO_SalesOrder_ui"))
Set o = oScript.NewObject("SO_SalesOrder_bus", oSS)
Set oLines = oScript.NewObject("SO_SalesOrder_bus", oSS)
'Set oLines = o.oLines

Still nothing,

Regards,

Manuel