Error while updating the farm credentials.

Hi,

I was getting the below error when i am trying to update the farm credentials using stsadm command in sharepoint 2010.

Value cannot be null.
Parameter name: farm

I got it because I had SQL Server (SHAREPOINT) not running. I have just started and ran the same command and it worked.

stsadm -o updatefarmcredentials -userlogin XXX -userpassword XXX