We are trying to load a new dimension table using the same format we have successfully used before(with a primary key for each combination) and we are getting a Ragged Heirarchy error and connot preview or load the table. Here is the exact error:

Dimension Preview Failed
The following error was encountered:
Error S09 in pmf_dim_ldr_look - Error S02_C in pmf_dim_ldr_look_edit_new, RAGGED Hierarchy found on Level: 01

Never Mind. We had a level_01 top level entry with no entries on the following 4 levels. When we removed it, it fixed the problem.