FAST Post Configuration Wizard fail

There're many error while you are installing FAST Search for SharePoint. Some of them are in the following links.
I got another error while running the post configuration with 2 server 1 admin and 1 non-admin with 1 row and 2 column.
I tried many times but fail.

But finally I got a simple solution:
Restart server after you install FAST for SharePoint binary then run FAST Configuration wizard again then it works!!

http://pornjeds.blogspot.com/2011/08/installation-of-fast-search-server.html

http://pornjeds.blogspot.com/2011/08/fast-search-server-2010-configuration.html

http://pornjeds.blogspot.com/2011/05/filed-to-initialize-session-with.html