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Starting, Logging and Stopping the SDM
GUI 
The SDM Server must be installed and started on the host that you want to access.

The SDM Server accepts only one user at a time. If somebody has already connected to it, you will receive an error message.
You can specify the port on the SDM GUI host machine that you want the SDM GUI to use to connect to the SDM Server host machine. To do so:
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1. Open the file /usr/sap/<SID>/<INSTANCE_NAME>/SDM/program/localsdmgui.properties.
2. Edit the value of the property localGUIClientPort:
¡ If it has value 0 (zero), then the port will be defined by the operating system.
¡ If it has value different than 0, then the connection will have to be established through port with this number.
3. Save the file.

You can set the local port for the SDM GUI before starting it.
To start SDM GUI, execute the following script file in the usr/sap/<SID>/<INSTANCE_NAME>/SDM/program directory:
RemoteGui.bat for Windows hosts
RemoteGui.sh for Unix hosts

If the SDM Server is not started, you will have to start it manually.

You have only three attempts to log on. If they fail because you have used a wrong password, the SDM server will be stopped.
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1. Choose SDM Gui ® Login
2. Enter the SDM Server password.
3. In the User Description (Optional) field you can enter a description of the user who is logging on. Any users who are then prevented from accessing the SDM can see this description.
4. Specify the SDM server hostname and port.
5. Choose Login.
When exiting the SDM, you have the option of choosing the button with quick info text Exit SDM to exit SDM GUI only, or Shutdown SDM Server and Exit to shut down both the SDM Server and the SDM GUI.