Editing tar file under osx

Hello Everyone!

I have this strange problem editing tar file with vim. vim can edit and update tar under Linux. But it might have some problem with osx. I could reproduce this problem on simple tar file(like - tar has one text file). Does anyone has problem using vim with tar file with osx (os x yosemite) ? Any help really appreciated.
Bellow is the error I am getting.

***error*** (tar#Write) sorry, unable to update /Users/user/mytar.tar with hello

Output from :message is :

"tarfile::hello" [Not edited] --No lines in buffer--

Here is a debug log for this problem :

"hello"
"hello" [New] 1L, 6C written
Calling shell to execute: "(tar --delete -f '/Users/user/mytar.tar' 'hello') >/var/folders/kr/4d2rsqs95bs1lv81d8jkkfwh0000gn/T/vbhpNWR/13 2>&1"
***error*** (tar#Write) sorry, unable to update /Users/user/mytar.tar with hello
chdir(..)
/private/var/folders/kr/4d2rsqs95bs1lv81d8jkkfwh0000gn/T/vbhpNWR/12
Calling shell to execute: "(/bin/rm -rf -- '_ZIPVIM_') >/var/folders/kr/4d2rsqs95bs1lv81d8jkkfwh0000gn/T/vbhpNWR/14 2>&1"

Thank you!

Best Regards,
Subbu

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