ERROR while creating new user - could not open relation mapping file global/pg_filenode.map

Hi All,

I am trying to use postgresql with a Rails app, and I am having an issue
creating a new user/password.
I get the following message:
createuser: could not connect to database postgres: FATAL: could not open
relation mapping file "global/pg_filenode.map": No such file or directory

I believe I might of accidentally deleted this file and after sudo
uninstalling Postgres with Brew and re-installing I still cannot get it back
or to work.

I am using the latest version of Postgres and I'm on Mac OS X 10.10.4

Any idea on how I can fix this issue? Thanks so much in advance.

Sergio



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