Able to rar files but doesn't Expand. java.io.IOException: unexpected EOF

[hyungKim]

<project name="Reports_A utomate" >
<untar src ="D:\Projects\f ilename.rar" dest="${D:\Proj ects}"/>
</project

OUTPUT: shows like this

Buildfile: D:\Projects\20121119.xml
    [untar] Expanding: D:\Projects into D:\Projects\sohyper\workspace\Reports_Automate\Unzip\${D:\Projects\sohyper\workspace\Reports_Automate\Unzip}
    [untar] Unable to expand to file D:\Projects\sohyper\workspace\Reports_Automate\Unzip\${D:\Projects\sohyper\workspace\Reports_Automate\Unzip}\Rar!
    [untar] Unable to expand to file D:\Projects\sohyper\workspace\Reports_Automate\Unzip\${D:\Projects\sohyper\workspace\Reports_Automate\Unzip}\???????|?}??a ???4
    [untar] 1?U???????h?H??TqR?`z?	w?????3??*?}K!Yp"6I???wg??b???M????????Y???m ???\dd
    [untar] Unable to expand to file D:\Projects\sohyper\workspace\Reports_Automate\Unzip\${D:\Projects\sohyper\workspace\Reports_Automate\Unzip}\i?J>?kz?kd???<??7?????????-??r???(?Ic?}sf6F??IJ?
    [untar] Unable to expand to file D:\Projects\sohyper\workspace\Reports_Automate\Unzip\${D:\Projects\sohyper\workspace\Reports_Automate\Unzip}\9?ZK???f????a?,?????z#?.?8*g??c6[>?7?2??>#Ig~H8???^?$???
    [untar] O???o?y??????????]?%??ZZ??AF??]?
    [untar] Unable to expand to file D:\Projects\sohyper\workspace\Reports_Automate\Unzip\${D:\Projects\sohyper\workspace\Reports_Automate\Unzip}\@4^v??Bd??^n?*-?:h???????
    [untar] }_^????-?*t?<?~??????1?-???26Q?@g???B?V????????sL?S???????7x?????d?

BUILD FAILED
D:\Projects\fin ame.xml:5: Error while expanding D:\Projects
java.io.IOExcep tion: unexpected EOF with 4608 bytes unread