NETREV ERROR WHILE IMPORTING

Hi all,
 
I was getting strange error while importing , error log shown below .
 
No issue in  schematic netlisting , while importing its throwing below error & board file save as #Taaaaao05016.SAV
 
If I edit the extension change to .brd it will open , pls let me anybody faced same issue ?
 ---------------------------------------------------------------------)
(                                                                     )
(    Allegro Netrev Import Logic                                      )
(                                                                     )
(    Drawing          : IW-PREDZ-BF-01-R1_0_050913_1931.brd           )
(    Software Version : 16.6S015                                      )
(    Date/Time        : Thu Sep 05 19:34:05 2013                      )
(                                                                     )
(---------------------------------------------------------------------)


------ Directives ------

RIPUP_ETCH FALSE;
RIPUP_DELETE_FIRST_SEGMENT FALSE;
RIPUP_RETAIN_BONDWIRE FALSE;
RIPUP_SYMBOLS ALWAYS;
Missing symbol has error FALSE;
SCHEMATIC_DIRECTORY 'D:\CADD_WORK\PREDZ\SCH';
BOARD_DIRECTORY '';
OLD_BOARD_NAME 'D:/Cadd_Work/PREDZ/BOARD/IW-PREDZ-BF-01-R1_0_050913_1931.brd';
NEW_BOARD_NAME 'D:/Cadd_Work/PREDZ/BOARD/IW-PREDZ-BF-01-R1_0_050913_1931.brd';

CmdLine: netrev -$ -i D:\CADD_WORK\PREDZ\SCH -y 1 -z -v D:/Cadd_Work/PREDZ/BOARD/#Taaaaao05016.tmp

------ Preparing to read pst files ------


#1   ERROR(24) File not found
     Packager files not found

#2   ERROR(102) Run stopped because errors were detected

netrev run on Sep 5 19:34:05 2013

   COMPILE 'logic'
   CHECK_PIN_NAMES OFF
   CROSS_REFERENCE OFF
   FEEDBACK OFF
   INCREMENTAL OFF
   INTERFACE_TYPE PHYSICAL
   MAX_ERRORS 500
   MERGE_MINIMUM 5
   NET_NAME_CHARS '#%&()*+-./:=>?@[]^_`|'
   NET_NAME_LENGTH 24
   OVERSIGHTS ON
   REPLACE_CHECK OFF
   SINGLE_NODE_NETS ON
   SPLIT_MINIMUM 0
   SUPPRESS   20
   WARNINGS ON

  2 errors detected
 No oversight detected
 No warning detected

cpu time      0:01:00
elapsed time  0:00:00

 
Best Regards.
Girish Kumar