I am trying to run Cadence's signalscan program. I get the following warnings when I launch it:

Warning: locale not supported by Xlib, locale set to C
Warning: X locale modifiers not supported, using default

The application opens up anyways, at which point the keyboard controls don't quite work. It accepts some key inputs (like alphanumeric characters typed into a text box), but not others (like ctrl-t).

I've tried solving the problem by installing locales and locales-all, among other things.

Please help. Thanks.