How To Fix TW169 - Connect is not possible: &

SAP Error Message - Details

• Message type: E = Error

• Message class: TW - R3trans - Messages

• Message number: 169

• Message text: Connect is not possible: &

What causes this issue?

R3trans cannot logon to the database.

System Response

The program is cancelled.

How to fix this error?

In the R3trans log you will find an SQL error number, which gives you
the cause of the error.
Environment variables not set (or incorrectly set) are the most
frequent reason for the error (TWO_TASK or ORACLE_SID/ORACLE_HOME).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TW169 - Connect is not possible: & ?

  The SAP error message TW169, which states "Connect is not possible: &," typically indicates that there is an issue with establishing a connection to a system or service. This error can occur in various contexts, such as when trying to connect to a database, an application server, or a remote system.
  Possible Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the target system.
  Incorrect Configuration: The connection parameters (such as hostname, port, or service name) may be incorrectly configured in the SAP system.
  Service Unavailability: The target service or system may be down or not running.
  Firewall Restrictions: Firewalls or security settings may be blocking the connection.
  Authorization Issues: The user may not have the necessary permissions to establish the connection.
  SAP Gateway Issues: Problems with the SAP Gateway configuration or service may prevent connections.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to verify that the target system is reachable from the SAP server.
  Ensure that there are no network outages or issues.
  
  
  
  Verify Connection Parameters:
  
  Check the connection settings in the SAP system (e.g., transaction codes like SM59 for RFC connections).
  Ensure that the hostname, port, and other parameters are correct.
  
  
  
  Check Target System Status:
  
  Ensure that the target system or service is up and running.
  If applicable, check the logs of the target system for any errors.
  
  
  
  Review Firewall Settings:
  
  Ensure that firewalls are configured to allow traffic on the required ports.
  Consult with your network/security team if necessary.
  
  
  
  Check User Authorizations:
  
  Verify that the user account being used to establish the connection has the necessary permissions.
  Check roles and authorizations in both the SAP system and the target system.
  
  
  
  SAP Gateway Configuration:
  
  If the connection involves an SAP Gateway, check the configuration and ensure that the gateway is running properly.
  Use transaction SMGW to monitor the gateway and check for any errors.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  SM59: For managing RFC connections.
  SMGW: For monitoring the SAP Gateway.
  SICF: For managing HTTP services.
  
  
  
  Logs and Traces:
  
  Check the system logs (SM21) and developer traces (ST22) for any related error messages that could provide more context.
  
  
  
  SAP Notes: 
  
  Search the SAP Support Portal for any relevant SAP Notes that may address specific issues related to the TW169 error.
  
  
  
  If the issue persists after checking these areas, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.