RFC ADAPTER destination hangs

Question

To All
I am working on a XI 7.0 system SP5 for netweaver 2004s and am having problems with the RFC adapter.
Steps as follows:-
1.Configure SM59 tcp ip destination on r/3(4.6C) sender system using Xi system host and gateway service
2. step 2 - configure communication channel on my scenario in Integration directory. Activate channel
3. Send Asynchronous message via prgram from R/3 sender
this delivers successfully to BW target ssytem via asynchronous RFC
My problem is when I repeat steps 3 to send more my rfc destination fails with the following in the trace log:-
Trace file opened at 20060303 160158 WST, REL 46D,0,1984, VER 3
======> CPIC-CALL: 'ThSAPECMINIT'
Transaction program not registered
Error RFCIO_ERROR_SYSERROR in abrfcpic.c : 1356
CPIC-CALL: 'ThSAPECMINIT'
Transaction program not registered
DEST =ZSCEN2_XI
HOST =%%RFCSERVER%%
PROG =ZBWIP24_19
GWHOST =ux0800
GWSERV =sapgw53
If I repeat setps 1 to 3 above with a new transaction program it will again work but only once.
Any help would be greatly appreciated and I will award points.
Regards
Liz Porter
PS the adaptor monitor periodically gives the following message:-
Sender Channel 'RFC_INDE4' for Party '', Service 'ERP_WATERCORP_SAPR3_D' (Internal Name 'RfcServer[RFC_INDE4]')
Server data: {jco.server.gwhost=ux0800, jco.server.progid=ZBWIP24_19, jco.server.gwserv=sapgw53, jco.server.unicode=0}
Repository data: {jco.client.lang=en, jco.client.snc_mode=0, jco.client.client=100, jco.client.passwd=******, jco.webas.ignore_jdsr_error=1, jco.client.user=portere0, jco.client.sysnr=81, jco.client.ashost=sapdev}
Current pool size: 1, max pool size : 50
RFC_HISTORY
- Error: 2006-03-03 16:49:27 WST:
RfcException:
message: CPIC-CALL: SAP_CMACCPTP3
no SAP ErrInfo available
Return code: RFC_SYS_EXCEPTION(3)
error group: 102
key: RFC_ERROR_COMMUNICATION

Answer 1

To All
The call from to the RFC destination is attempted as tRFC
see below:-
PARAMETERS:P_TPLNR LIKE IFLOT-TPLNR,
           P_DESTN LIKE TRFCQOUT-DEST DEFAULT 'ZSCEN2_XI'.
CALL FUNCTION 'ZBWIP_FUNCTIONAL_LOCN_OUT'
   IN BACKGROUND TASK
    DESTINATION P_DESTN
     TABLES
       FUNCT_LOC_MAIN       = T_TABLE.
  IF SY-SUBRC = 0.
    COMMIT WORK.
    WRITE:/ 'So far so good check XI'.
  ELSE.
    WRITE:/ 'Error ', SY-SUBRC.
  ENDIF.
The SM59 parameters on R/3 4.6C as set as
Connection type T     TCP/IP connection
Activation Type: registration
  Program ID   ZBWIP24_28
Gateway:-
Type                 T  TCP/IP connection
Gateway host    ux0800
Gateway service sapgw53
and finally tRFC:-
Connection attempts up to task        2
Time betw. 2 tries [mins]             10
In the XI integration directory:-
Adapter type RFc sender
Application Server(gateway) ux0800
Application service(gateway)  sapgw53
Program id                    ZBWIP24_28
Initial Connections           1
Maximum connections           50
Advanced Mode   Maximum reconnection delay 3
A bit more information from our XI system.  In SMGW on XI our program shows as "connected" and on drill-down shows status receive data/send.  If however we configure a SM59 TCP-IP connection  on XI to our XI gateway(ie connect to myself) I get the same CPIC message about 677 timeout for registered program.
Regards
Liz