The root of the problem
The "WSAECONNREFUSED: Connection refused" or "No SAProuter found" error in SAP GUI generally occurs when the SAP Logon client cannot establish communication with the SAP application server. This is usually due to two main causes:
- The dispatcher port of the SAP instance (for example, 3200 + instance number) is blocked by the network firewall.
- The client's local configuration file (
saplogon.ini or services) is corrupted, outdated, or contains incorrect entries.
Step by step: How to check port availability
1. Identify the correct port
The SAP dispatcher port is calculated as 3200 + the instance number. For example, if the instance is 00, the port will be 3200. If it is 01, it will be 3201.
2. Test connectivity to the port
Use tools such as
Nmap or the
telnet command to check whether the port is open:
telnet [IP_del_servidor] [puerto_del_dispatcher]If the command fails, the port is blocked by the firewall or the service is unavailable.
Step by step: Reset or update the connection file entries
1. Locate the saplogon.ini file
The
saplogon.ini file is located at the following path:
- Windows:
C:Users[Usuario]AppDataRoamingSAPCommon
2. Check the file’s entries
Open the file with a text editor and verify that the entries match the server configuration. Example:
[stringversion1]nDescription=SAP_SERVERnService=3200nMessageServer=[IP_del_Mensaje_Server]nGroup=PUBLIC3. Update or correct the entries
If any entry is incorrect, update it with the values provided by the SAP administrator.
4. Save and restart SAP GUI
Save the changes and restart SAP GUI to test the connection.
Frequently Asked Questions (FAQs)
What should I do if the port is blocked by the firewall?
Contact the infrastructure or security team to request that the necessary port be opened.
How can I create a new saplogon.ini file?
If the file is corrupted, delete it and SAP GUI will generate a new one upon restart.
What if the error persists after completing these steps?
Check the full network connectivity and make sure the SAP server is up and running.
