sc query sapstartsrv_<SID> or look for SAP <SID> System in Services.msc.
sapcontrol -nr <instance> -function StartService sapstartsrv listens on port 5<instance>13 (e.g., instance 00 → port 50013). Test connectivity:
ERROR: bind() failed (Address already in use) ERROR: Could not register service with WINS Often, the problem is transient. Restarting fixes it: cannot connect to service sapstartsrv
sapcontrol -nr <instance> -function StopService sapcontrol -nr <instance> -function StartService If sapcontrol itself can’t connect, kill the process manually:
This message essentially means the SAP Management Console (or a related tool) can’t communicate with the sapstartsrv process—the service responsible for starting, stopping, and monitoring SAP instances on Windows or Linux. Without it, you’re locked out of basic control functions. sc query sapstartsrv_<SID> or look for SAP <SID>
sapstartsrv.exe -regsvc -p <profile> -noreg -trace Check service unit file:
ps -ef | grep sapstartsrv systemctl status sapstartsrv_<SID> If it’s not running, start it manually: Subscribe to the blog for weekly deep dives
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systemctl cat sapstartsrv_<SID> Common fix: restart and enable
Then, re-register the service (if corrupted):
sapcontrol -host <hostname> -nr <nr> -function GetProcessList If that works but -host localhost fails, check your /etc/hosts (Linux) or C:\Windows\System32\drivers\etc\hosts (Windows). Navigate to: C:\usr\sap\<SID>\SYS\profile\ Open START_<SID>_<inst>_<host> and ensure SAPLOCALHOST is correct.