HI Hanif,
Please do the below:
cleanipc <SCS-instance-no> remove
(where <SCS-instance-no> is the instance number of the SCS).
Then execute the 'cleanipc <nr> remove' with the root user to ensure that none of the SHM segments are present. Once this is done, stop the complete SAP server.Now start it again (first start the SCS<nr> and then the server nodes).If the issue persists, attach the whole work folder.
regards,
Hemanth
SAP AGS