I have a cube that works great until I add an invoice dimension; then I get
the error in the title bar.

I have a fact table that is generated from a set of transactions. Each
transaction contains an invoice number. Each invoice number may be used
multiple times. The invoice number is datawarehoused and given a unique
Primary key. That primary key is then incorporated into the fact table.

The end result is that a primary key for each invoice is inserted into the
fact table. There are no nulls. I haven't any idea why this should produce
this error.

Any suggestions?

Thanks