If your SAPOSS connection dosen’t work , please check the following check and possible solution steps to solve the problem…

Go to transaction SM59 and open the RFC connection SAPOSS

Click the “Connection Test” button

If you are getting the “Name or password is incorrect.Please re-enter” message like below

Then use/check the following logon informations

Client         000

User           OSS_RFC

Password  cpic

SAVE the informations and please click the “Connection Test” button again

It should be work and look like below screen

If problem still exist then check the KBA  1636864   RFC connection error  – name or password is incorrect.