R12.1.3 : Patching 16236435 failed with an below error: adrelink: error: Product library for product

Hi,
Patching 16236435 failed with an below error on the clone instance :

The file $APPL_TOP/admin/dev/out/plkapp000.txt contains:
***
bom     bin     BMCCCI  $APPL_TOP/bom/12.0.0/bin/BMCCCI
***
adrelink: error: Product library for product "bom" not found.
"bom" might not be listed correctly in your env file,
you may be missing some files for product "bom",
or "bom" could be an invalid product.

adrelink will not try to link product "bom".
Continuing work on other products...

the adrelink.log file is showing :

------------------------------------------------------
Current product is  AD
adrelink: Warning: not setting  LADLIB
since $APPL_TOP/ad/12.0.0/lib/libad.a does not exist