[OSM-dev] osmosis error

[BG]

Hej.

I use the load-next script from "how to minutely hstore" Tutorial. 
Everything works fine until i enable the expire option.
I get an error:
rm: cannot remove 'load-next.pid': No such file or directory

I dont unterstand this. I looked in the script files, there is no 
command, which says remove something.
i looked at do-expire.rb, expire.rb and update.rb.
But i dont have a clue whats wrong.

Hope you can help me.