Can not select mesh edge loop...

Attaching a file is unnecessary I guess, since I use the default cube…

Any idea why this might be?

Its this instance in the preferences, right?

Thanks for the suggestion,

Attachments


since I use the default cube…
The default cube does not have an edge loop so there is nothing to select. What are you exactly trying to do ?
By default Alt+RMB selects an edge loop and Ctrl+Alt+RMB selects an edge ring