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Having Issues setting up RFC for new Unix Server (ie. HELP!)

Former Member
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Hello all. I (and a group of contractors) have been struggling with this issue for a few months at this point and are pretty much out of ideas. We are upgrading from a PA-RISC to an Itanium machine and have been able to update all of our software except for the RFC handling.

<p>We are using the libraries and objects from NWRFC_9-20004304.SAR.

<p>We first use rfcexec with the following data:

<p>/* for AU2 on ahq***** */








<p>And the resulting output is:


<p>cat dev_rfc


<p>**** Trace file opened at 20120104 112228 EST SAP-REL 640,0,303 RFC-VER 3 1100046

<p>======> Destination 'aurserver' not found in 'saprfc.ini'


<p>**** Trace file opened at 20120104 112231 EST SAP-REL 640,0,303 RFC-VER 3 1100046

<p>*> RfcRegisterProgram ...

<p> Server Program ID = isnts40_ia_trilogy.AU2

<p> Host name of Gateway =

<p> Service of Gateway = 3306

<p> RFC-Trace = ON

<p> SNC Own Name =

<p> SNC Library Name =

<p> RFC Handle = 1

<p><* RfcRegisterProgram ended successfully



<p>>>>> RfcAbort called by external program ...

<p> handle = 1

<p> text = Could not open file rfcexec.sec


<p>>>>> rfcAbort called by RFC Library in file: abrfc.c, line: 612

<p> handle = 1

<p> text = Could not open file rfcexec.sec

<p>>>>> [1] < accepted > : REG <ac: 1> L >>> FLUSH (READ)

<p>Error RFCIO_ERROR_SYSERROR in abrfcio.c : 2446

<p>---> RFC MESSAGE/ERROR : 102


<p>* connection closed

<p>>>>> [1] < accepted > : REG <ac: 2> L >>> ABORT abrfc.c 732

<p>>>>> [1] < accepted > : REG <ac: 3> L >>> CLOSE abrfcio.c 3247

<p>>>>> [1] < accepted > : REG <ac: 4> L >>> FREE abrfcio.c 3248


<p>**** Trace file opened at 20120104 112231 EST SAP-REL 640,0,303 RFC-VER 3 1100046

<p><<<< RfcAbort


<p><* rfcAbort

<p><* RfcAbort

<p>First thing, I'm assuming this was successful though the Abort at the end concerns me.
<p>Using the rfcexec.cpp program as a basis, the contractors provided a sample program of their own code attempting to <p>connect through RFC.  Here is what they are doing:

#include "sapnwrfc.h"

<p>#include "sapdecf.h"

<p>#include <string>


<p>// We are using non Unicode verision of SAP NW API and SAP_UC datatype is char is our case

<p>// But it turned out that we received non char buffer from SAP.

<p>// converts SAP_UC buffer to char buffer.

<p>// In GDB we can see that key field for example is following:

<p>// key = "\000R\000F\000C\000_\000I\000N\000V\000A\000L\000I\000D\000_\000P\000A\000R\000A\000M\000E\000T\000E\000R"

<p>// instead of "RFC_INVALID_PARAMETER".

<p>// The purpose of the function to trim extra zeros to see human readable error decription.

<p>char * sap_uc2c(char * dest, SAP_UC * src, size_t len)


<p> memset(dest, 0, len);

<p> for (int i = 0, j = 0; i < len; ++i) {

<p> if ( src<i> != '\0' )

<p> dest[j++] = src<i>;

<p> }

<p> return dest;



<p>void errorHandling(RFC_RC rc, SAP_UC description[], RFC_ERROR_INFO* errorInfo, RFC_CONNECTION_HANDLE connection){

<p> printfU(cU("Connection errorHandling"));

<p> const size_t err_key_size = sizeof(errorInfo->key) / sizeof(errorInfo->key[0]);

<p> const size_t err_message_size = sizeof(errorInfo->message) / sizeof(errorInfo->message[0]);


<p> char err_key[err_key_size];

<p> char err_message[err_message_size];

<p> sap_uc2c(err_key, errorInfo->key, err_key_size);

<p> sap_uc2c(err_message, errorInfo->message, err_message_size);


<p> printfU(cU("\n== ERROR_INFO ==\nKey: %s\nMessage: %s\n"), err_key, err_message);


<p> // It's better to close the TCP/IP connection cleanly, than to just let the

<p> // backend get a "Connection reset by peer" error...

<p> if (connection != NULL) RfcCloseConnection(connection, errorInfo);


<p> exit(1);


<p>int mainU(int argc, SAP_UC** argv){

<p> RFC_RC rc = RFC_OK;



<p> RFC_ERROR_INFO errorInfo;


<p> // Connection information is configured in below three lines of code

<p> serverCon[0].name = cU("program_id"); serverCon[0].value = cU("isnts40_ia_trilogy.AU2");

<p> serverCon[1].name = cU("gwhost"); serverCon[1].value = cU("");

<p> serverCon[2].name = cU("gwserv"); serverCon[2].value = cU("sapgw06");


<p> const char * str1 = serverCon[0].value;

<p> const char * str2 = serverCon[1].value;

<p> const char * str3 = serverCon[2].value;

<p> printfU(cU(str1));

<p> printfU(cU("\n"));

<p> printfU(cU(str2));

<p> printfU(cU("\n"));

<p> printfU(cU(str3));

<p> printfU(cU("\n"));

<p> printfU(cU("Registering Server..."));


<p> serverHandle = RfcRegisterServer(serverCon, 6, &errorInfo);

<p> if (serverHandle == NULL)

<p> errorHandling(errorInfo.code, cU("Error Starting RFC Server"), &errorInfo, NULL);

<p> printfU(cU(" ...done\n"));


<p> printfU(cU("Starting to listen...\n\n"));

<p> while(RFC_OK == rc || RFC_RETRY == rc || RFC_ABAP_EXCEPTION == rc){

<p> rc = RfcListenAndDispatch(serverHandle, 120, &errorInfo);

<p> printfU(cU("RfcListenAndDispatch() returned %s\n"), RfcGetRcAsString(rc));

<p> switch (rc){

<p> case RFC_RETRY: // This only notifies us, that no request came in within the timeout period.

<p> // We just continue our loop.

<p> printfU(cU("No request within 120s.\n"));

<p> break;

<p> case RFC_ABAP_EXCEPTION: // Our function module implementation has returned RFC_ABAP_EXCEPTION.

<p> // This is equivalent to an ABAP function module throwing an ABAP Exception.

<p> // The Exception has been returned to the SAP system and our connection is still open.

<p> // So we just loop around.

<p> printfU(cU("ABAP_EXCEPTION in implementing function: %s\n"), errorInfo.key);

<p> break;

<p> case RFC_NOT_FOUND: // The SAP system tried to invoke a function module, for which we did not supply

<p> // an implementation. The SAP system has been notified of this through a SYSTEM_FAILURE,

<p> // so we need to refresh our connection.

<p> printfU(cU("Unknown function module: %s\n"), errorInfo.message);

<p> case RFC_EXTERNAL_FAILURE: // Our function module implementation raised a SYSTEM_FAILURE. In this case

<p> // the connection needs to be refreshed as well.

<p> printfU(cU("SYSTEM_FAILURE has been sent to backend.\n\n"));

<p> case RFC_ABAP_MESSAGE: // And in this case a fresh connection is needed as well

<p> serverHandle = RfcRegisterServer(serverCon, 3, &errorInfo);

<p> rc = errorInfo.code;

<p> break;

<p> }

<p> }


<p> return 0;


<p>As you can see, the connection data is hard coded rather than read from the *.ini file just for testing purposes. Our main thing to accomplish is to successfully establish a connection somehow.

<p>Currently we are getting the following as the output from the above program:






<p>Registering Server...Connection errorHandling

<p>== ERROR_INFO ==


<p>Message: Parameter ASHOST, GWHOST or MSHOST is missing.


<p>Any ideas or suggestions on how we can get this working?

Edited by: Brad Smith on Jan 4, 2012 12:10 PM

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Former Member
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Hello Smith

Do you maintain entries in "saprfc.ini". If not please try that. Below is the link

Thanks & regards