Fs_Clone fails with "ERROR: RC-50410: Fatal: OUI Registration failed with an Abnormal Termination error" (Doc ID 2095966.1)

SYMPTOMS
When attempting to run fs_clone, the following error occurs.
ERROR: RC-50410: Fatal: OUI Registration failed with an Abnormal Termination error during call from ouicli.pl. Please check the log file $INST_TOP/admin/log/ohclone.log for more details.
Raised by oracle.apps.ad.clone.ApplyAppsTechStack
CAUSE
Checking $ENV variable to confirm it's set:
echo $ENV
/rhome/applxebsd99/.bashrc
According BUG 20787492 - PDHDEV1 - FS_CLONE FAILED ON UPGRADE TO R12.2.4, ouicli.pl (adouitools.pl) sets TMP intentionally to /tmp. Having $ENV set will prevent ouicli.pl for setting the /tmp.
SOLUTION
1. Please check if $ENV is set
echo $ENV
2. If $ENV is set please unset it
unset ENV
3. Once the $ENV is unset run again fs_clone force=yes.