Pl review these MOS Docs carefully
1383621.1 for R12.2 - Section 3, Step 3.2, substep 2.1
406982.1 for R12.1 - Section 2, Step 2b
230672.1 for 11i - Section 2, Step 2b
All 3 clearly state that the database ORACLE_HOME binaries need to be copied from source to target. Which documents are you following for your cloning process ?
Oracle home is not copied. why it is not copied and how it will replicate on the target side.
I understand you have no issues with copying the application tier node files and the issue with the database tier node files. If so, please post the list of files directories you have on the target database node.
Did you compress the files under the database $ORACLE_HOME and copy it like it was done with 10.1.2/10.1.3 ORACLE_HOMEs?
in all the documents Apps tire (apps_st, tech_st) is copied completly by tar and on the database tire end only tech_st copied. Oracle home is not copied. why it is not copied and how it will replicate on the target side.
When you copy tech_st you are actually copying oracle_home because oracle home resides under tech_st
Hope understood your post correctly