I use version 2.6.1 , when build cube on step 'build Dimension Dictionary' for lookup tables ,it throws some exceptions,it seems checks the content size of each field in the table while building Dimension Dictionary, and build all fields in the table with a dictionary.
1. Large content fields may not be dimension columns, in fact, it is not necessary to check the value size of non-dimension columns，only check dimension columns.
2. If the value of some fields in the dimension table is too long, the exception is not clear, can not be located the problem column quickly.
3. There is no need to build dictionaries for non-dimensional columns