Hi

Sorry I forgot to give the pg_hba.conf detail

Error message -

============== removing existing temp installation    ==============
============== creating temporary installation        ==============
============== initializing database system           ==============
============== starting postmaster                    ==============
running on port 65432 with pid 8227
============== creating database "regression"         ==============
createdb: could not connect to database template1: FATAL:  missing or erroneous pg_hba.conf file
HINT:  See server log for details.
pg_regress: createdb failed

Present pg_hba.conf entries -

# TYPE  DATABASE    USER        IP-ADDRESS        IP-MASK           METHOD

local   all         all                                             trust
host all all ??? 255.255.255.255 trust
host all all 0.0.0.0 0.0.0.0 trust

# IPv4-style local connections:
host    all         all         127.0.0.1         255.255.255.255   trust
# IPv6-style local connections:
host    all         all         ::1               ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff        trust

I'm stuck here and could not proceed any further can you please help.