Hi Charlie,
I'll give your suggestions a go and let you know what happens. Right now, I'm barking up the corrupted CDX tree... I know, grasping at straws.
>oData.AppendOrRecall(.cMainKey,.cMainTable)
>LOCAL RecNo
>SET COVERAGE TO C:\Temp\Log.TXT && Not additive here.
>RecNo = RECNO(m.cmTable)
>.Refresh
>IF m.RecNo <> RECNO(m.cmTable)
> SET COVERAGE TO
> MODI FILE C:\Temp\Log.TXT
> * Look for commands that changed the pointer.
>ENDIF

Thanks for your response.
Regards,
Robin