Hi Prashanth,

In my case, turns out it was the version of TABCMD I was using. The server was running version 9 and I thought I could just go online and download TABCMD for version 9 (which I did). Turns out that even though the Major version number was the same - the minor version number was not exactly the same...I didn't record the version numbers but the digits in the xxxx.xxxx differed betwwen the two versions:

     i.e. 9000.15.xxxx.xxxx (for version 9)

So, I got our server admin to send me a copy of TABCMD that was included with the server install and everything worked after that. I have no idea way minor change in version number is causing this error because they were both "version 9". Also I have no idea why the Tableau website was providing only that version.

Edit: Also another thing to try when doing export is to add --no-cert check at the end of your command string. THis is also a requirement in some cases, but in my case I had tried that and made no difference (it was the tabcmd version issue)