How To Fix TT356 - RFC error & &

TT356 - Overview

• Message type: E = Error

• Message class: TT - Extended Computer Aided Test Tool (eCATT) messages

• Message number: 356

• Message text: RFC error & &

What causes this issue?

RFC Error
You want to remotely execute a test or individual functions of a test
using internally a Remote Function Call (RFC) interface. The system
requires an RFC destination that is processed using transaction SM59.
RFC System Error
This error occurs if a system is terminated on the receiver side.
RFC Communication Error
This error is raised if a problem occurs when establishing the
connection or the communication.

System Response

All RFC errors are registered in the log. In addition, entries are
created in the system log and dumps are written in case of terminations.

How to fix this error?

In its variable part, the error message entered in the log contains an
error text that is output by the RFC interface.
In many cases, the error text describes the cause of the problem so
accurately that the problem can be solved or avoided.
If the error text is unclear or too general - for example, CONNECTION
CLOSED -, you must find other ways to search for the cause of the
problem.
You can search for information in the source system and target system
using the following transactions:
SM21 System log display
ST22 Dump analysis
There are only a few RFC errors for which no system log entries or dumps
are created. In these cases, an RFC trace can help to find the cause of
the error. A corresponding RFC trace option is provided by the
transaction
ST01 System trace

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TT356 - RFC error & & ?

  The SAP error message TT356, which indicates an RFC (Remote Function Call) error, typically arises when there is a problem with the communication between SAP systems or between an SAP system and an external system. The error message may include additional details that can help diagnose the specific issue.
  Possible Causes of TT356 RFC Error:
  
  
  Network Issues: There may be network connectivity problems between the SAP systems or between the SAP system and the external system.
  
  
  
  Configuration Issues: Incorrect RFC destination configuration in the SAP system can lead to this error. This includes incorrect settings in transaction SM59.
  
  
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to execute the requested function.
  
  
  System Availability: The target system may be down or not reachable due to maintenance or other issues.
  
  
  Timeouts: The RFC call may be timing out due to long processing times or network delays.
  
  
  Version Compatibility: There may be