Hello,
Could you provide us with the scm-server-0.log and catalina.out log?
The first step should always be to check the scm-server-0.log file in the sepm\tomcat\logs folder.
Also check the catalina.out logfile. It may contain info if there is a port conflict on the server.
In the scm-server-0.log, you will find the error in the line, just before the indentation changes!!
Also, f you have upgraded the SEPM, then you will have upgrade.log .
That log is extremely useful in case of troubleshooting Java -1 in SEP SBE 12
Please post the error message from the logs above, and then we can decide the steps ahead.