Preparing query: select F_MODULO(3, 2) from rdb$database

Error: *** IBPP::SQLException ***

Context: Statement::Prepare( select F_MODULO(3, 2) from rdb$database

 )

Message: isc_dsql_prepare failed

SQL Message : -104

Invalid token

Engine Code    : 335544343

Engine Message :

invalid request BLR at offset 60

function F_MODULO is not defined

module name or entrypoint could not be found

Total execution time: 0.003s

library myUDF;

{ Important note about DLL memory management: ShareMem must be the

  first unit in your library's USES clause AND your project's (select

  Project-View Source) USES clause if your DLL exports any procedures or

  functions that pass strings as parameters or function results. This

  applies to all strings passed to and from your DLL--even those that

  are nested in records and classes. ShareMem is the interface unit to

  the BORLNDMM.DLL shared memory manager, which must be deployed along

  with your DLL. To avoid using BORLNDMM.DLL, pass string information

  using PChar or ShortString parameters. }

uses

  System.SysUtils,

  System.Classes;

//{$R *.res}

function Modulo(var i, j: Integer): Integer; cdecl;

begin

  if (j = 0) then

    result := -1 // just check the boundary condition, and

  // return a reasonably uninteresting answer.

  else

    result := i mod j;

end;

exports

  Modulo;

begin

end.

Integer, Integer

RETURNS Integer BY VALUE 

ENTRY_POINT 'Modulo'

MODULE_NAME 'myDLL';