I have come accross this error before, and here is what worked for me.
This usually happens if the user does not have designate or access rights to
the taskpad of the other user.

You need to have the user print without TaskPad Information
Follow these steps to deselect the TaskPad option when printing the Daily
Style:

1. Open the shared calendar.
2. On the Outlook File menu, click Print.
3. Under Print Style, click to select Daily Style and click Page Setup.
4. Click TaskPad to deselect it.
5. Click OK and OK to close and print.

Attila