sc query sapstartsrv_<SID> or look for SAP <SID> System in Services.msc.
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Then, re-register the service (if corrupted):
telnet localhost 50013 or
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.
Few things are as frustrating as firing up SAP MMC or trying to start an SAP instance, only to be met with the dreaded error: “Cannot connect to service sapstartsrv.”
sapstartsrv.exe -regsvc -p <profile> -noreg -trace Check service unit file: cannot connect to service sapstartsrv
ERROR: bind() failed (Address already in use) ERROR: Could not register service with WINS Often, the problem is transient. Restarting fixes it:
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sapcontrol -nr <instance> -function StartService sapstartsrv listens on port 5<instance>13 (e.g., instance 00 → port 50013). Test connectivity: sc query sapstartsrv_<SID> or look for SAP <SID>
Restart SAP <SID> System from Services.msc.
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.
ps -ef | grep sapstartsrv systemctl status sapstartsrv_<SID> If it’s not running, start it manually: Restarting fixes it: Need more SAP troubleshooting guides
sapcontrol -nr <instance> -function StopService sapcontrol -nr <instance> -function StartService If sapcontrol itself can’t connect, kill the process manually:
systemctl cat sapstartsrv_<SID> Common fix: restart and enable