Error: "When checking a pre-PG 9.1 live old server, you must specify the old server's port number."

I am trying to upgrade my PostgreSQL instance from 9.0.22 to 9.4.4.

However, I am getting the following error when executing pg_upgrade.

"When checking a pre-PG 9.1 live old server, you must specify the old server's port number.
Failure, exiting"

I am executing the following command. I have tried substituting -o '-p 50432' instead of -o '-p 5438'
I get the same result.

It appears as though I am not successfully passing the old instance port assignment into the pg_upgrade script.

Anyone seen this one before?

/app/PostgreSQL/9.4/bin/pg_upgrade -b /app/PostgreSQL/9.0/bin -B /app/PostgreSQL/9.4/bin -d /pgsql/stip/data9 -D /pgsql/stip/data94 -o '-p 5438' -U furlongs_a -c -v

Thank you,
Shane Furlong
U.S. Department of Energy
Office of Scientific and Technical Information (OSTI)
(865) 574-9316, Rm 206-1, office
(865) 973-3276 mobile
furlongs(at)osti(dot)gov<mailto:furlongs(at)osti(dot)gov>