R12.2.3 adop phase=fs_clone txkADOPPreparePhaseSynchronize.pl failed exit code 255

When attempting to apply patch p18123067_R12.FND.C_R12_GENERIC.zip,
ERROR
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CLONE2014-03-14_02-33-17PM.error
WARNING : Mar 14, 2014 2:33:21 PM - ERROR - CLONE-20263   Invalid Oracle Inventory.
WARNING : Mar 14, 2014 2:33:21 PM - CAUSE - CLONE-20263   There are two possible causes for an invalid OraInventory "/u01/PROD/oraInventory".
1. Inventory was empty.
2. It did not have valid inventory.xml file.
WARNING : Mar 14, 2014 2:33:21 PM - ACTION - CLONE-20263   Provide a valid Oracle Inventory.
The inventory directory does not exist.
1. /etc/oraInct.loc ==> /u01/PAT/oraInventory (customer's OLD PAT Centralized Inventory Directory)
2. "/u01/PROD/oraInventory" Des Not exist on the instance.
Sol
1. change the setting for /etc/oraInventory.loc to an existing directory
2. run adop phase=fs_clone force=yes OR adop phase=fs_clone