Error when modify Data template value

[emi65]

I'm using
CACTI Version 0.8.7h
Versione MySQL: 5.1.41-3
Ubuntu 10.04.3 LTS
RRDtool 1.3.8

When I attempt to modify a value (maximum from data templates I got this error

Error: Save Failed: Field Input Error (Check Red Fields)

I attach the image of the error

Some one could help me ?

Regards
Emilio

[TheWitness]

Don't use dashes.

[emi65]

OK , thanks

The problem was born because I automatically imported the datatemplate from the Nagios2Cacti plugin and in this
way the application allow me to create the name with dashes character ...... but when I want to
modify some parameters from the cacti form this is not allowed

Now I modify the DS name and all works fine

thanks a lot

ciao
emilio