Multiple session open in SAP on JCO function call with setSAPGUI(2)

Dear all
I have a standalone java program, which is internally calling an SAP function using JCO 2.0.
This SAP function is internally calling a tCode using ABAP4_CALL_TRANSACTION.
I have set SAPGUI to 2.
            mConnection =
                    JCO.createClient("XXX", "user", "password", "lang", "host", "num", "", "");
            System.out.println("SAPGUI set to 2");
            mConnection.setSapGui(2);
            mConnection.setProperty("jco.destination.name", "SAPGUI");
            mConnection.connect();
SAP GUI is launched with the desired tCode on execution of this java program.
But the issue is there are three sessions on SAP, when checked from SM04.
550     USERNAME     HOSTNAME          13.09.00     1     RFC     0
550     USERNAME     HOSTNAME     TCODE     13.09.00     1     RFC     4
550     USERNAME     HOSTNAME          13.09.00     1     GUI     0
The sessions are active even after JCO connection is disconnected and java program terminates.
Can anybody help in this.
Thanks a lot
Regards
Ruhi Hira

Hi Peter,
Thanks for the prompt response.
I would surely check with the ABAPer's on your observation. However there is one more observation that is worrying me.
If I use the given code with just one record in JCO.Table, the first push to SAP works with data getting inserted into the SAP table. However subsequent to this no records get inserted into SAP even though i populate JCO.Table with just one record.
Also just a small correction to what I had stated earlier - If I use the code with multiple records in JCO.Table no records got inserted into SAP.
Thanks
Mohid

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*** 07/19/09 11:57 pm *** (CHG: Sta->97)
*** 07/19/09 11:57 pm RESPONSE ***
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Attachments:
_GPIB.h ‏4 KB

Part 2:
Int TGpib::Open (UShort adr, ULong timeoutMs)
if (mDevices.empty ())
Reset ();
Int ud = ibdev (mBoardID, adr, 0, TimeoutCode (timeoutMs), 1, 0);
if (ud < 0)
MCTraceLib (this, eTraceError, TFCTX, _T("open device '%d' failed"), adr);
GPIBError (-1, FCTX, true);
return -1;
SDevInfo devInf;
devInf.mGpibAdr = adr;
mDevices[ud] = devInf;
if (!DeviceClear (ud))
MCTraceLib (this, eTraceError, TFCTX, _T("no device on address '%d'"), adr);
GPIBError (ud, FCTX, true);
Close (ud);
return -1;
if (Send (ud, "*IDN?"))
Tstring s = String2Tstring (Enter (ud));
StringList l = Split (s, _T(','));
if (l.size () == 4)
mDevices[ud].mVendorName = l[0];
mDevices[ud].mModelName = l[1];
else
MCTraceLib (this, eTraceError, TFCTX, _T("no device on address '%d'"), adr);
GPIBError (ud, FCTX, true);
Close (ud);
return -1;
Local (ud);
return ud;
bool TGpib::Close (Int ud)
GPIBDevMap::iterator it = mDevices.find (ud);
if (it != mDevices.end ())
Local (ud);
Int stat = ibonl (ud, 0);
if ((stat & ERR) != 0)
MCTraceLib (this, eTraceError, TFCTX, _T("close device ud = '%d' failed"), ud);
GPIBError (ud, FCTX, true);
return false;
mDevices.erase (it);
return true;
return false;
bool TGpib::SetTimeout (Int ud, ULong timeoutMs)
Int stat = ibtmo (ud, TimeoutCode (timeoutMs));
if ((stat & ERR) != 0)
MCTraceLib (this, eTraceError, TFCTX, _T("set timeout device ud = '%d' failed"), ud);
GPIBError (ud, FCTX, true);
return false;
return true;
ULong TGpib::Timeout ()
return mTimeout;
bool TGpib::EnableSRQ (Int ud, HANDLE srqEvent)
if (srqEvent != INVALID_HANDLE_VALUE)
GPIBDevMap::iterator it = mDevices.find (ud);
if (it != mDevices.end ())
(it->second).mSRQEvent = srqEvent;
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MCTraceLib (this, eTraceError, TFCTX, _T("on device ud = '%d' failed"), ud);
GPIBError (ud, FCTX, true);
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MCTraceLib (this, eTraceDebug, TFCTX, _T("(SRQ)on device ud = '%d' success"), ud);
return true;
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MCTraceLib (this, eTraceError, TFCTX, _T("srqEvent == INVALID_HANDLE_VALUE"));
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return true;
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ibask (ud, IbaPAD, &adr);
adr += 32; // Talk Address = Listen Address + 32
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GPIBError (ud, FCTX, true);
return false;
mDevices[ud].mRemote = true;
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mDevices[ud].mRemote = false;
Int stat = ibloc (ud);
if ((stat & ERR) != 0)
MCTraceLib (this, eTraceError, TFCTX, _T("on device ud = '%d' failed"), ud);
GPIBError (ud, FCTX, true);
return false;
return true;
char TGpib::SerialPoll (Int ud)
char pollChr;
Int stat = ibrsp (ud, &pollChr);
if ((stat & ERR) != 0)
MCTraceLib (this, eTraceError, TFCTX, _T("on device ud = '%d' failed"), ud);
GPIBError (ud, FCTX);
return false;
return static_cast<char> (pollChr & 0x9F); // VM QueryError eliminieren
bool TGpib::DeviceClear (Int ud)
Int stat = ibclr (ud);
if ((stat & ERR) != 0)
MCTraceLib (this, eTraceError, TFCTX, _T("on device ud = '%d' failed"), ud);
GPIBError (ud, FCTX, true);
return false;
return true;
bool TGpib::Trigger (Int ud)
Int stat = ibtrg (ud);
if ((stat & ERR) != 0)
MCTraceLib (this, eTraceError, TFCTX, _T("on device ud = '%d' failed"), ud);
GPIBError (ud, FCTX);
return false;
return true;
bool TGpib::Send (Int ud, const std::string& str)
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if ((stat & ERR) != 0)
MCTraceLib (this, eTraceError, TFCTX, _T("'EOI on' on ud = '%d' failed"), ud);
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GPIBError (ud, FCTX);
return false;
if (sent != static_cast<Long> (str.length ()))
MCTraceLib (this, eTraceError, TFCTX, _T("only %d of %d characters sent"), sent, str.length ());
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return true;
bool TGpib::SendNoEOI (Int ud, const std::string& str)
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stat = ibwrt (ud, (void*)str.c_str (), str.length ());
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GPIBError (ud, FCTX);
return false;
if (sent != static_cast<Long> (str.length ()))
MCTraceLib (this, eTraceError, TFCTX, _T("only %d of %d characters sent"), sent, str.length ());
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return true;
std::string TGpib::Enter (Int ud)
std::string str = "";
char* buf = new char[2048];
Int stat = ibrd (ud, (void*)buf, 2047);
Long got = ThreadIbcntl ();
if ((stat & ERR) != 0)
MCTraceLib (this, eTraceError, TFCTX, _T("on device ud = '%d' failed"), ud);
GPIBError (ud, FCTX);
else
buf[got] = '\0';
str = buf;
// eventuelle LF und CR vom Ende entfernen!
string::size_type idx = str.find_last_of (k_CR);
str = str.substr (0, idx);
idx = str.find_last_of (k_LF);
str = str.substr (0, idx);
delete[] buf;
return str;

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manjukn wrote:
Hi Experts,
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