I am using Smart View 22.214.171.124.00 (Build 27) and having got error when using composite form, because it is unable to get the selected member when executing Business Rule on save.
I´ve searched down about this issue and found the article "[ID 1450454.1] - Composite Form Unable To Get The Selected Member When Executing The Business Rule On Save". Right after have applied the solution offered the HBR has not run anymore. This article explain that this issue has been fixed in the EPM v126.96.36.199 release but i am using this version currently.
Also at readme document from Planning 188.8.131.52 version (http://docs.oracle.com/cd/E17236_01/epm.1112/hp_1112100_readme.pdf) , the issue # 11075506 you can find a reference to this issue.