How To Fix E0748 - IDoc transfer: CPI-C error - error while closing connection

E0748 - Overview

• Message type: E = Error

• Message class: E0 - SAP EDI messages

• Message number: 748

• Message text: IDoc transfer: CPI-C error - error while closing connection

What causes this issue?

The CPI-C command 'communication deallocate' failed.
Return code for the command: &v1&

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?

If the error keeps occurring, activate the CPI-C trace functionality.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message E0748 - IDoc transfer: CPI-C error - error while closing connection ?

  The SAP error message E0748, which indicates a "CPI-C error - error while closing connection" during IDoc transfer, typically arises from issues related to the communication between SAP systems or between an SAP system and an external system. Here are some potential causes, solutions, and related information for this error:
  Causes:
  
  Network Issues: Problems with the network connection between the systems can lead to communication failures.
  Configuration Errors: Incorrect settings in the RFC (Remote Function Call) destination or IDoc configuration can cause this error.
  System Overload: High load on the SAP system or the receiving system can lead to timeouts or connection issues.
  Firewall or Security Settings: Firewalls or security settings may block the communication between systems.
  IDoc Processing Errors: Issues with the IDoc itself, such as incorrect data or format, can lead to connection problems.
  CPI-C Protocol Issues: Problems with the CPI-C protocol used for communication can also trigger this error.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there