Emerson Exchange 365

we upgraded our DeltaV system from DV 6.3.4 to DV 8.4.2 .

at first step we found an issue with custom dynamo and related datalink in graphic pages.

All custom dynamo are going to use of bellow expression.

"=============================================================================================

Private Sub AIM_29_MouseMove(ByVal Button As Integer, ByVal Shift As Long, ByVal X As Double, ByVal Y As Double)

'this function is called when the mouse moves over the picture.

On Error GoTo ErrorHandler
'TxtTagName_PID_1.Caption = stored MODULNAME
TxtTagName53.Description = ReadValue("Fix32." + ps_datasource59.CurrentValue + "/DESC.A_CV")
Exit Sub
ErrorHandler:
frsHandleError

End Sub

"=============================================================================================

After using of "DeltaV Upgrade picture expert" that highlighted item do not change to DVYSY.  

So when we point the curser on any datalink on the graphic pages , we see this error : 

"Data source is unintended: Fix32.DVSYS.10PI-101/DESC.A_CV"

and when I do manually change from "Fix32." to "DVSYS."  on the data link related expression , this error appeared:

"Data source is unintended: DVSYS.THISNODE.-025/DESC.A_CV"

Please guide me what is the best solution's for this Issue?

Tank you in-advanced.