Failure When Trying to Patch weblogic Using bsu Command: Encountered unrecognized patch ID

I have downloaded and unzipped the weblogic psu patch in /shared/patches and tried to apply using below command  bsu.sh(smart update).

./bsu.sh -install -patch_download_dir=/shared/patches/ -patchlist=DEM4 -prod_dir=/as11g/jay_tch/product/middleware/11.1/wlserver_10.3

It throws Encountered unrecognized patch ID:XXXXX



Solution:

 To resolve this error, extract the patch files (one xml file and the jar file with Path ID name) in to {MW_Home}/utils/bsu/cache_dir directory.

If cache_dire directory is not available in {MW_Home}/utils/bsu directory, then create it and copy the files.