Cygwin 'initdb failed'

Hi,
I am trying to create a new database cluster using initdb but I keep getting the following error? Does anybody know how I can resolve this?

$ initdb --pgdata /usr/local/pgibeam --username=postgres --pwprompt --debug
Running in debug mode.

initdb: internal variables:
PGDATA=/usr/local/pgibeam
datadir=/usr/share/postgresql
PGPATH=/usr/bin
ENCODING=
ENCODINGID=0
POSTGRES_SUPERUSERNAME=postgres
POSTGRES_BKI=/usr/share/postgresql/postgres.bki
POSTGRES_DESCR=/usr/share/postgresql/postgres.description
POSTGRESQL_CONF_SAMPLE=/usr/share/postgresql/postgresql.conf.sample
PG_HBA_SAMPLE=/usr/share/postgresql/pg_hba.conf.sample
PG_IDENT_SAMPLE=/usr/share/postgresql/pg_ident.conf.sample
The files belonging to this database system will be owned by user "mmehmood".
This user must also own the server process.

The database cluster will be initialized with locale C.

creating directory /usr/local/pgibeam... ok
creating directory /usr/local/pgibeam/base... ok
creating directory /usr/local/pgibeam/global... ok
creating directory /usr/local/pgibeam/pg_xlog... ok
creating directory /usr/local/pgibeam/pg_clog... ok
selecting default max_connections... Signal 12
Signal 12
Signal 12
Signal 12
Signal 12
Signal 12
10
selecting default shared_buffers... Signal 12
Signal 12
Signal 12
Signal 12
Signal 12
Signal 12
Signal 12
Signal 12
Signal 12
Signal 12
Signal 12
50
creating configuration files... ok
creating template1 database in /usr/local/pgibeam/base/1... DEBUG: invoking Ip
MemoryCreate(size=1081344)
Signal 12

initdb: failed
initdb: removing data directory "/usr/local/pgibeam"

Thanks
Moiz