Multiple Frequency issue

[castellionair]

I set multiple frequency formatted as suggested in the information, like this:

-f 868M f 868.3M f 868.33M f 868.95M

but won't work. On log file said;

Opening file: f failed!

[tomcoder2k]

Need a '-' before each f. -f 868M -f 868.3M -f 868.33M -f 868.95M