[Aide] What is the correct syntax for "aide --compare"

[FIGARO Nicolas]

Hi, 

I'd like to compare two databases using the aide --compare, but I can't
find the correct syntax. 
(and the manual pages looks quite old). 

How can I specify the two databases to be compared ? 

I tried to run aide like below but I always have the same answer :
Configuration error
aide -c myconf database1 database2 --compare 
aide -c myconf -B "database_in=database1" -B "database_in=database2"
--compare 

Thanks 

Nicolas Figaro