SUM - java.lang.NullPointerException

Dear all,

I´m stack at the execution step of SUM upgrade with the following error:

Oct 27, 2014 3:02:02 PM [Error ]: The following problem has occurred during step execution: com.sap.sdt.j2ee.tools.controlservice.ServiceControllerException: Cannot install and start service for instance 0 on host SAP1.

Could not run OS process sapstartsrv.exe for action install service.

Could not start process D:\usr\sap\SLM\DVEBMGS00\exe\sapstartsrv.exe.

Error while executing process D:\usr\sap\SLM\DVEBMGS00\exe\sapstartsrv.exe.

java.lang.NullPointerException: null

java.lang.NullPointerException

Please help.

Regards,

NC\