How to fix Opatch apply Cannot set up OUI inventory session

While apply the missing patches in ebs during upgrading below error coming.| Opatch apply cannot set up oui inventory session error . ERROR: OPatch failed because of Inventory problem.

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opatch apply cannot set up oui inventory session error

$opatch apply

Error:-

OPATCH_JAVA_ERROR=OUI Version: 11.1.0.11.0

OPatch requires OUI 10.1 or earlier.

Cannot set up OUI inventory session.

ERROR: OPatch failed because of Inventory problem.

We will ensure that correct version of oui and opatch apply under /data05/EBS_FS_12.2.5/fs1/FMW_Home/webtier/ . so that easily apply rest of the patches.

Note:-The OUI version must be 10.1.x.x.x. The latest 10.1.x.x.x version can be downloaded from

MOS.Refer to Patch 6640838

Please verify that you select a 10.1.x.x.x version. Do NOT select 10.2.x.x.x or 11.x.x.x versions.