Minimwach is "grayed" out

[simoncn]

I have tried setting ohnet.subnet in Properties (watch) and it is working for me.

Which version of MinimWatch are you running? You can find this by selecting Options > About (watch).

When you get the java.lang.NullPointerException message, what is the full stack trace? You should be able to find this by selecting Options > Show log (watch) or by looking for a crash dump file (on Windows) in the folder

C:\Users\your-user-name\AppData\Roaming\MinimWatch\data

The AppData folder is hidden by default in Windows Explorer, so you need to type the above path into the Explorer address bar.