reboot your machine.
This is a known issue of the 7.01 kernel - don't ask me up to which patch level...
The problem is that older 7.01 sapstartsrv.exe (the sap service executable) did flag a tcp socket handle (used for the communication between sapmmc and service) to be inheritable by created processes.
When you are supplying a new, the old service executable will start the processes which will inherit the socket handle. During the startup all executables including sapstartsrv.exe will be updated. the service itself detects that it is updated and will restart itself. During the restart it is creating the socket a second time so that you have 2 times the socked listening to the same port.
sapmmc the reconnects to the socket - if it is hiting the wrong one it will hang.
Rebooting the box (you can alternatively kill all SAP processes using taskmanager and starting the system will fix the problem.
regards
Peter
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