FileRepMetagen[DRP]. is a warning for a file with low reputation, and as seen on the VT scan it is very new
First submission 2014-05-14 02:01:51 UTC ( 1 week ago )
You can report it using one of these options......you may add a link to this topic in case they reply here
You can upload files and report issues to avast here :
http://www.avast.com/contact-form.php (select subject according to Your case)
You can use mail
send to virus@avast.com in a password protected zip file
mail subject: False Positive / undetected sample (select subject according to your case)
zip password: infected
or you can send files from avast chest
how to use the chest.
http://www.avast.com/faq.php?article=AVKB21