Patch: 8919491 - R12.ATG_PF.B.delta.3 failed with Error (WFRESGEN_FAILED)

Hi,
Patch Failed with below error:

wferr:
  - WFRESGEN_FAILED
  - WFUPI_FAIL MESSAGE=ORA-04063: package body "APPS.WF_CORE" has errors
ORA-06508: PL/SQL: could not find program unit being called: "APPS.WF_CORE"
ORA-06512: at line 1 STATEMENT=BEGIN WF_CORE.SESSION_LEVEL:=0; WF_CORE.UPLOAD_MODE:='FORCE'; END;

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This sounds identical to the errors reported in "Patch 9239090 errors in rrsdlmnu.sql ORA-04063: package body "APPS.WF_CORE" has errors (Doc ID 1323314.1)"

Download and apply patch 9739567:R12.OWF.B- 1OFF:12.1.1:9544115:PO APPROVAL NOTIFICATION DOES NOT REFRESH WITH CHANGE

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After applied the patch Package got valid and patch went through with out issues.