I am not a heavy Crystal Reports user (Me FoxPro), but it looks like there might be another hoop or hook we have to go through to get Crystal Reports to see a MM DataSet.

If I create a ds like this:
Dim ds As New DataSet
'Get all users sorted by group
ds = Me.oUsersDetail.GetUsersByGroup

and then try to use it like this:
'Pass the populated dataset to the report
oRpt.SetDataSource(ds)

it doesn't seem to like it. If I clone the dataset into a table it seems to like it.

Any ideas about this?

Thanks.