Description

Whenever Users tries to Login via Studio or Transaction User gets the Error "Connection to Message Server Failed Service ? Unknown"

Applies to

10X; 11X

Solution

This error occurs when entry of the sap system message port is not present in the services file.

Location of services file: %windir%\system32\drivers\etc

Add the following entry at the end of services file.

sapms[SID]         36[system number]/tcp          # comment

Note : this entry in the services file should be followed by {return} key.

Example:
W47 connects to sap using message server logon with system number 03

sapmsW47         3603/tcp          # SAP System Message Port for W47

How to determine the system number?
1. System number can be found from saplogon.ini file and also for XML the process is same

1. Open saplogon.ini/XML in notepad
2. Locate section > [Description]
3. Note the Item number of server use
4. Locate section > [Database]

In this section, go to item number that we had noted, here you will find the system number