How To Fix E0736 - IDoc transfer: Error while connection to R/2 System was being closed

SAP Error Message - Details

• Message type: E = Error

• Message class: E0 - SAP EDI messages

• Message number: 736

• Message text: IDoc transfer: Error while connection to R/2 System was being closed

What causes this issue?

The SAP system could not execute a CPI-C connection to the R/2 system.
The following command could not be executed correctly:
&v1&.
The symbolic destination is: &v2&

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Ensure that the CPI-C communication to the symbolic destination &v2& R/2
system is working.
Maintain the corresponding CPI-C tables, e.g. table TXCOM.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message E0736 - IDoc transfer: Error while connection to R/2 System was being closed ?

  The SAP error message E0736, which indicates an issue with IDoc transfer due to a connection problem with the R/2 system, can arise from various causes. Here’s a breakdown of potential causes, solutions, and related information:
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the R/2 system, leading to a dropped connection.
  Configuration Errors: Incorrect configuration settings in the RFC (Remote Function Call) destination for the R/2 system can lead to connection issues.
  Timeout Settings: The connection may be timing out due to inactivity or long processing times.
  R/2 System Availability: The R/2 system may be down or not reachable at the time of the IDoc transfer.
  Resource Limitations: The R/2 system may be experiencing resource limitations (e.g., memory, CPU) that prevent it from processing the IDoc.
  Version Compatibility: There may be compatibility issues between the SAP system and the R/2 system, especially if they are running different versions.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there are no network issues between the SAP system and the R/2 system. You can use tools like ping or traceroute to diagnose connectivity.
  Review RFC Configuration: Verify the RFC destination settings in transaction SM59. Ensure that the connection parameters are correct and that the connection type is appropriate.
  Adjust Timeout Settings: If timeouts are an issue, consider increasing the timeout settings in the RFC destination configuration.
  Check R/2 System Status: Ensure that the R/2 system is up and running. You may need to contact the system administrator for the R/2 system to confirm its status.
  Monitor Resource Usage: Check the resource usage on the R/2 system to ensure it is not overloaded. If necessary, optimize the system or allocate more resources.
  Compatibility Check: Ensure that both systems are compatible in terms of versions and configurations. If there are known issues, consider applying patches or updates.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SM58 (for monitoring asynchronous RFC calls) and SM21 (for system logs) to gather more information about the error.
  IDoc Monitoring: Use transaction WE02 or WE05 to monitor IDocs and check their status.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to IDoc transfers and R/2 connections.
  Documentation: Review SAP documentation for IDoc processing and RFC connections for best practices and troubleshooting steps.
  
  By following these steps, you should be able to identify and resolve the issue causing the E0736 error message during IDoc transfer.