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Symptom Error Logon balancing error 88. Cannot connect to message server (rc=9) every time you logon to the SAP system. Solution 1. Check your SAP system is up and running.

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2. Check with your colleagues, are they able to login or only you just affected. 3. Go to C:\WINDOWS\system32\drivers\etc directory. Open your services file. Con firm that the entries is correctly configured. Make sure that the sapms xxxx/tcp is inside the services file. As example, sapmsPRD 3601/tcp, PRD is the SID, 36 is the port and 01 is the Central Instance number. Noted, if the entry is added at the end of the services file, please put a blank line after it. 4. Restart your desktop/laptop. Test the connection again.

Read more: http://itsiti.com/logon-balancing-error-88-cannot-connect-to-messageserver-rc9#ixzz1sgh3IVD8