If all the cubes and infoobjects are still there, you may have to create /CPMB/BPC and /CPMB/Env1 and manually drag and drop cubes and infoobjects back to /CPMB/Env1. Of course, to make these cucbe and infoobjects recognized by BPC, you need to make sure the related information are still saved in BPC table. Such as what I suggested before, check table UJA_APPL.
You may also try to run program UJA_DATA_CHECKER. If no error, it means all the information saved in the BPC table is good and consistent.