History problem on specific devices

Hi,

I got some devices with a "/" in the hostname because there are switch devices.

For instance: GBWI-IDG-CSW08/10 or GBWI-IDG-CSW09/11

When i click on each metric, then i click on "history" button, i always got the msg:

"Cannot open history file"

On fs, the directory hostname doesn't exist in hist folder.

What's wrong ?

Thanks

Regards,

Nicolas Lienard