I'd like to know how to show particular file name of monitoring to the mail statement

I'd like to know how to show particular file name of monitoring to the mail statement

I set a folder monitoring to the OPManager.
If particular file *yyyymmdd* such as FILE20160708.csv. arises OPManager sends a mail.
Finding the particular file name and sending a mail worked,but the statement is not good.
I want to show the filename to the mail statement such as
----A new file FILE20160708.csv has arise in the folder------
I used a Variable {FILENAME} but it didn't work.
The statement showd like
----A new file  {FILENAME} has arise in the folder------
Will someone show me how to show the particular filename?(filename changes everyday)
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