Regarding installation of GNATS

[shilpa.reddy]

My directory name is gnats-4.0
I have run the following commands successfully....
1)  ./configure
2) make
3) make install
4) I go into gnats directory. There is a file named "mkdb"
     In this directory I run "mkdb default".........  I encounter the following

 

    mkdb: No proper entry for default in /usr/local/etc/gnats/databases
    grep: /usr/local/etc/gnats/databases: Is a directory
   grep: /usr/local/etc/gnats/databases: Is a directory

 

What do I do now ??