Hi. Sorry for the late of this replay.
Here an exemple log line (with debug flag enabled) when Hazel has not run my script.
2015-04-02 23:13:42.308 hazelworker[35563] DEBUG: Clipboard_jd.txt: TheRuleName. Not executing actions.
next i forced the rule and it run with no problem.
I can add an information: Clipboard_jd.txt stays in a Dropbox folder. I red from this thread
viewtopic.php?f=1&t=4653 that there is a problem with Shared folders but Clipboard_jd.txt's is not shared with anyone.