Index out of range when trying to create a new dimension (reporting type)

I just created all my dimensions/characteristics, created 2 cubes/infocubes (rate & ownership) in my new appset called 'CONSOLIDATION' and I can't seem to create a 'reporting type cube'.

When I try to create a cube called TEST or CONSO... (generic, finance or conso) it says 'index as out of range. Must be non negative & less than the size of the collection. Parameter name : index'. The message pops up immediately, before I can even try to choose dimensions.

Anybody who has a clue, I look forward to suggestions.

Regards

Nico