SAPCAR extract error

Hi,

  I am unable to extract scs.sar file of SP14 . When i try to extract scs.sar with command

 sapcar -xvf scs.sar 

I am getting the below error...

<i>

SAPCAR: could not open for writing SAPCAR.exe (error 28). The process cannot access the file because it is being used by another process.

</i>

I am able to extract other SAR files.

Any Ideas??..

Regards

Vasu