With TM1 10.2 security changes, TM1 10.2 now allows you to share/re-use the same dimension in multiple approval applications.  This is a nice feature, since it eliminates the need to maintain a duplicate dimension.  With that being said, there are changes to how security is structured and managed in this new version.  Please review the documentation in the link provided, as there will be changes automatically generated to models upgraded from versions prior to 10.2.

http://www-01.ibm.com/support/docview.wss?uid=swg21651554

If you have additional questions regarding security in TM1 10.2 please reach out to us at services@lodestarsolutions.com.  We have a fantastic services team ready to answer all of your questions.  Also if you have not joined our community yet, what are you waiting for?  Go to lodestarsolutions.com and join today!  it takes less than 1 min and you will ensure that you are among the first to know about how new programs and blogs.