Dimensionality() with calculated dimensions

[Sa_Rah]

Hi

Is it possible to use Dimensionality() with calculated dimensions? 

The below formula works if I have fixed dimensions Division and Specialty, but if I use 

=pick($(vDimension1), Division, Specialty)

to select the two dimensions, it doesn't seem to work. Help! 

if (Dimensionality() = 1, NUM(count({<AttendStatus = {"Attended"}>} distinct [EmpNo])/count ( total <Division> distinct [EmpNo]),'0.00%'),

if (Dimensionality() = 2, NUM(count({<AttendStatus = {"Attended"}>} distinct [EmpNo])/count ( total <Division,Specialty> distinct [EmpNo]),'0.00%'),

NUM(count({<AttendStatus = {"Attended"}>} distinct [EmpNo])/count ( distinct [EmpNo]),'0.00%')))

Thanks

Sarah