Hi Travis, The pep contains this sample: """ Nested array :: struct { int ival; double data[16*4]; } """i:ival: (16,4)d:data: """ """ I think it is wrong and must be changed to the following; is this correct? """ Nested array :: struct { int ival; double data[16][4]; } """i:ival: (16,4)d:data: """ """ Thomas