meshDB ElmerGUI

Dear All

I just try ElmerGUI and I don't understand meshDB under Model>Setup, meshDB "." ".".

Could anyone help me to explain the meshDB, how to fill the information, if possible with a simple example for a better understanding.

Every time i run, always start with the following error. I guess because of incorrect entry in meshDB?
MAIN:

---

MAIN: Reading Model ...
ERROR:: Model Input:

Thanks
Waluyo
UTHM