ORA-24334: no descriptor for this position

My platform is
Windows 2003 Server Enterprise Edition
Oracle9i Enterprise Edition Release 9.2.0.8.0 - Production

I'm using Oracle Objects for OLE, version 11.1

On the MFC client:

oraPar.Add("pub_xx", idp, OPARAMETER_INVAR, OTYPE_NUMBER); OParameter mP = oraPar.Add("retCur", "", OPARAMETER_INOUTVAR, OTYPE_CURSOR);
OSqlStmt stmt(*pArg->pODB, "begin
epstest.get_prod_info(:pub_xx,:retCur);
end;", OSQLSTMT_FAILEXEC);

On the server:

procedure get_prod_info (

   vpub_xx in spacer_pub.xx%type,
   vrefCur out sr.refCur
) as

   vroot_xx spacer_pub.xx%type;
   vparent_xx spacer_pub.xx%type;
   vcid_xx cid_info.xx%type := null;
begin

   vroot_xx := vpub_xx;

   while vroot_xx is not null and vcid_xx is null loop

      select decode(p.powtorka,null,p.cid_xx,null),
        (select min(p2.xx) from spacer_pub p2,makieta m
         where p.powtorka is not null and p2.mak_xx=m.xx and
                   m.kiedy=sr.powtseed+p.powtorka and 
p2.adno=nvl(p.old_adno,p.adno))
      into vcid_xx,vparent_xx from spacer_pub p where p.xx=vroot_xx;

      vroot_xx := vparent_xx;

   open vrefCur for

       select bbox,kolor from cid_info where xx=nvl(vcid_xx,-1); exception

   when others then

      open vrefCur for select 1 from dual where 0=1; end get_prod_info;

This works fine in single threaded application. When I'm using several thread serialized on database client level (oo4o initialized by OStartup(OSTARTUP_APARTMENTTHREADED);) it throws:
Error in SQL statement, ORA-24334: no descriptor for this position or
Error fetching data, ORA-24334: no descriptor for this position or sometimes:
Error fetching data, ORA-01403: no data found

It happens one time per 1000 calls on average, but the application is business critical and it can't go this way.

I did not use OStartup(OSTARTUP_MULTITHREADED) as it doesn't work with other MFC-OLE stuff (copy-paste automation). The error is "COM not initialized"

Is this application level error, e.g. my mistake or Oracle problem? Any suggestions will be apreciated

Regards,

    Marcin Received on Wed Jul 16 2008 - 10:46:25 CDT