How To Fix DNO188 - RFC error: &1 &2

SAP Error Message - Details

• Message type: E = Error

• Message class: DNO - Messages for General Notifications

• Message number: 188

• Message text: RFC error: &1 &2

What causes this issue?

An error occurred when an RFC module was called in the SAP problem
notification system.

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?

Use transaction SM59 to check the connections SAP-OSS and
SAP-OSS-LIST-O01.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DNO188 - RFC error: &1 &2 ?

  The SAP error message DNO188, which indicates an RFC (Remote Function Call) error, typically arises when there is an issue with communication between SAP systems or between an SAP system and an external system. The message format DNO188 RFC error: &1 &2 usually includes two parameters that provide more specific information about the error.
  Causes of DNO188 RFC Error
  
  
  Network Issues: Problems with the network connection between the SAP systems can lead to RFC errors. This could be due to firewalls, routing issues, or network outages.
  
  
  
  Configuration Issues: Incorrect configuration of RFC destinations in the SAP system can cause communication failures. This includes incorrect settings in the transaction SM59.
  
  
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to perform the requested operation.
  
  
  System Availability: The target system may be down or not reachable, leading to an inability to establish an RFC connection.
  
  
  Resource Limitations: The SAP system may