Standard RFC Vs tRFC

Hi..
While studying some XI material I came across tRFC. Please some body can tell me what is the difference between standard RFC and tRFC.
Thanks,
Pavani

Hi Pavani,
There are 5 types of RFCs
1. Synchronous RFC (sRFC) - calll waits for target response n then only the control proceeds
2. Asynchronous RFC (aRFC) - can be with or without response - "With" action like emailing based on any condition "Without" - exception raised during execution of RFM not propogated to client.
3. Transactional RFC (tRFC) - let us group one or more function modules - all FM are executed or none. Used for guaranteed transactional execution
4. Queued RFC (qRFC) - To conrol the execution order
5. Parallel RFC (pRFC) - Extension of aRFC. We can select group of Application servers to execute the RFCs. Multiple RFC destinations, Built-in load balancing and alerting mechanism

[Reward if helpful]
Regards,
Prateek

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Hi
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What is the difference between ASYNCHRONOUS RFC and TRANSACTIONAL RFC. I'm totally confused.

Hi
Asynchronous remote function calls (aRFCs) are similar to transactional RFCs, in that the user does not have to wait for their completion before continuing the calling dialog. There are three characteristics, however, that distinguish asynchronous RFCs from transactional RFCs:
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· Asynchronous RFCs allow the user to carry on an interactive dialog with the remote system.
· The calling program can receive results from the asynchronous RFC.
You can use asynchronous remote function calls whenever you need to establish communication with a remote system, but do not want to wait for the functions result before continuing processing. Asynchronous RFCs can also be sent to the same system. In this case, the system opens a new session (or window). You can then switch back and for between the calling dialog and the called session
RECEIVE RESULTS FROM FUNCTION Remotefunction is used within a FORM routine to receive the results of an asynchronous remote function call. The following receiving parameters are available:
 IMPORTING
 TABLES
 EXCEPTIONS
The addition KEEPING TASK prevents an asynchronous connection from being closed after receiving the results of the processing. The relevant remote context (roll area) is kept for re-use until the caller terminates the connection.

Issues with standard RFCs

Hi ,
I am getting following error when i tried to execute transaction - SLDCHECK.
Exchange Infrastructure: Test LCR Connection
Properties of RFC destination SAPSLDAPI
RFC host:
%%RFCSERVER%%
program id:      SAPSLDAPI_SSD
gateway host:
subdev
gateway service: sapgw00
Testing the RFC connection to the SLD java client...
RFC ping returned exception with message:
program state check for conversation 73851491 / CPIC-CALL: 'ThSAPCMRCV' : cmRc=2
Summary: Connection to SLD does not work
=> Check SLD function and configurations
Now checking access to the XI Profile
Properties of RFC destination LCRSAPRFC
RFC host:
%%RFCSERVER%%
program id:      LCRSAPRFC_SSD
gateway host:
subdev
gateway service: sapgw00
Testing the RFC connection to the SLD java client...
RFC ping returned exception with message:
program state check for conversation 73852497 / CPIC-CALL: 'ThSAPCMRCV' : cmRc=2
then i tried to test RFC connections : SAPSLDAPI
and LCRSAPRFC_SSD. I am geting following error:
Logon     Cancel
Error Details     program state check for conversation 73534888 / CPIC-CALL: 'ThSAPCMRCV' : cmRc=2
Error Details     ERROR: program state check for conversation 73534888
Error Details     LOCATION: SAP-Gateway on host subdev / sapgw00
Error Details     DETAIL: program sapgw00 on host subdev called function SEND_DATA in state INIT
Error Details     COMPONENT: SAP-Gateway
Error Details     COUNTER: 21708
Error Details     MODULE: gwr3cpic.c
Error Details     LINE: 3282
Error Details     RETURN CODE: 471
Error Details     SUBRC: 0
Error Details     RELEASE: 700
Error Details     TIME: Wed Jan 2 11:47:09 2008
Error Details     VERSION: 2
thx,
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Hi,
There are several potential causes for a broken communication between an ABAP WebAS and the System Landscape Directory. The linked Problem Analysis Scenario (PAS) provides a systematic problem analysis and solving flow.
refer SAP Note 768452
Hope this will help you a bit.
Regards
Aashish Sinha
PS : reward points if helpful

Using RFC or HTTP adapter

Hi All,
I want to configure a receiver adator as the receiver adaptor in the sap xi system which will receive data from a 3rd party.
In this case among the adaptors RFC, SOAP, & HTTP which one will be the best to use and why ?
Also please let me how to use the RFC adapter as a trfc call.
Regards...

Hi Santosh,
You can receive your data from the 3rd party either with soap or http adapter. You can use rfc adapter for sending data to sap.
RFCs are of 5 types. Please check this thread for detailed information:
standard RFC Vs tRFC
From SAP help:
The RFC adapter maps the following RFC calls to XML messages and the other way around:
● Synchronous RFC calls (sRFCs) in messages with Structure linkquality of service Best Effort (BE)
● Transactional RFC calls (tRFCs) in messages with quality of service Exactly Once (EO)
● The receiver RFC adapter can also process messages with quality of service Exactly Once In Order (EOIO). They are mapped to transactional RFC calls (tRFC).
You have tRFC and qRFC queues. Take a look at this blogs:
/people/sap.india5/blog/2006/01/03/xi-asynchronous-message-processing-understanding-xi-queues-part-i
Regards,
---Satish

Standard RFC Vs tRFC

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