Any guesses on this from anybody?

>My users export a lot of their data to Excel, both for manipulation and printing.
>
>Every once it a blue moon, somebody will get an error like this
>
>OLE IDISPATCH EXCEPTION CODE 0 FROM MICROSOFT EXCEL: UNABLE TO GET THE PRINTOUT PROPERTY OF THE SHEETS CLASS.
>
>Another error I see refers to the PASTE property.
>
>Why might these errors be occurring? What, if anything, can I do about them?