why doesn't this regular expression get recognized by codeigniter's router

[eluser]PhilTem[/eluser]
- is a special character in regexp code. You need to escape it using \ otherwise regexp will interpret it as a spacer defining a range from
parameter OR type OR something to (range from 0 to 9 multiple times)

Maybe try a slightly simpler code

Code:

$route["(parameter\-([0-9]+))"] = 'somecontroller';

which should re-route
parameter-1, paramter-2, ... to somecontroller.
And then add further options on the first part (replace parameter with (parameter|type|something))