Urgent !!! SQL Server Error

[geetha kethireddy <kgreddy@YAHOO.COM>]

SQL Server 7.0
SQR 4.3.4

I am recieving the following error when executing an
SQR that inserts into a series of tables.

Error:
(SQR 5528) ODBC SQL dbexec: SQLExecute error 8162 in
cursor 18:
  [Microsoft] [ODBC SQL Server Driver] [SQL
Server]Formal parameter '@P21' was defined as OUTPUT
but the actual parameter not declared OUTPUT.

It always seems to error out on the second row. It
successfully inserts the first row. Moreover, it is
only bombing when inserting into this particular
table.
I don't know where to look. Any help would be greatly
appreciated.

Thank you
Geetha

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