A problem with /

So, I'm having an issue with a slash (not the guitarist...).

This crops up occasionally, but I've figured out a simple patch to demonstrate:

When I try and use a number with a... whats the term... a form of punctuation attached, like a comma, it seems to come out in list form with a slash. I'm trying to use this just to generate a simple ramp, so I can send a message to a 'line~' object to fade a sound down over a period of time. So if I can just send it a value which is the duration of the sample, it will fade evenly until it stops.

Any ideas of how to implement this just so it forms a nice and friendly line~ message?

Thanks! :)