join: too many non-option agruments

[Tari Drumgo]

Hello my name is Tari, and I am a novice on this unix. My problem bug is 
that I am also getting the message

join: too many non-option agruments, when I am trying to join to files.

For example:
join -t: -a1 -j1 1 -j2 1 pnn pnum > pacetrep

So every time the command is entered, I receive the error above. Any 
suggestions.

Thank you,
Tari

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