PO_PDOI_HEADER_PROCESS_PVT not compiling

 Customer is having invalid objects after upgrading database from 9.2.0.8 to 11.2.0.2 and application from 11.5.8 to 11.5.10.2: One of them is                                                                          

PO_PDOI_HEADER_PROCESS_PVT

Suggested compiling apps schema from adadmin.

Had them try compile it wiht alter package, and get the following

SQL> alter package  PO_PDOI_HEADER_PROCESS_PVT compile;

Warning: Package altered with compilation errors.

SQL> select * from user_errors where name = ' PO_PDOI_HEADER_PROCESS_PVT';

no rows selected 

.

Have the following version files.

[applmgr@dev-apps ~]$ strings -a $PO_TOP/patch/115/sql/PO_PDOI_HEADER_PROCESS_PVT.plb |grep '$Header'

/* $Header: PO_PDOI_HEADER_PROCESS_PVT.plb 120.30.12010000.4 2009/10/13 07:00:38 sknandip ship $ */