I am experiencing a problem when attempting to add a new calculated
member to a cube.

An "OLAP Manager Addin" dialog box pops up and tells me:
Unable to expand node.
The parameter is incorrect

Click OK - the Calculated Member Builder dialog box pops up but with
no items in the Data tree control.

Also, if I attempt to browse the cube from the data tab in Cube Editor
it tells me that it is "Unable to browse the cube" "An unexpected
internal error has occurred. Please restart the application"

I have SQL2K SP3 - I have MDAC 2.71

I have restarted

And now I'm out of ideas - can anyone help?