TCP3C8A Operation not authorised

TCP3C8A Diagnostic 30 03/06/14 11:08:32.145896 QTMFCLIE
QTCP *STMT QTMFCLIE QTCP *STMT
From module . . . . . . . . :
QTMFUTIL
From procedure . . . . . . :
qtmf_IssueMessage__FPcT1ie
Statement . . . . . . . . . : 351
To module . . . . . . . . . :
QTMFCLIE
To procedure . . . . . . . : main
Statement . . . . . . . . . : 658
Message . . . . : Operation not
authorized.
Recovery . . . : See your system
administrator or security officer.

I have a remote user trying to use an FTP script, for ALL the other remote
users it logs onto my server, PUTs a file on my system and QUITs.
This one user gets this message in their joblog when they try to do the
exact same thing ... five attempts than abends.
I have googled the TCP3C8A but the webpage that comes up is less use than a
chocolate tea-pot.

I need a large can of inspiration if someone can supply?

Jeff Bull