While setup new cacti hosts and some time graphs doesn't show at all, check apache logs and if found below errors Apache error logs.
ERROR: I don't understand ':46:35 To 2013/11/20 21:46:35\c' in command: 'COMMENT:From 2013/11/19 21:46:35 To 2013/11/20 21:46:35\c'.
ERROR: I don't understand ':46:35 To 2013/11/20 21:46:35\c' in command: 'COMMENT:From 2013/11/19 21:46:35 To 2013/11/20 21:46:35\c'.
ERROR: I don't understand ':46:35 To 2013/11/20 21:46:35\c' in command: 'COMMENT:From 2013/11/19 21:46:35 To 2013/11/20 21:46:35\c'.
ERROR: I don't understand ':46:35 To 2013/11/20 21:46:35\c' in command: 'COMMENT:From 2013/11/19 21:46:35 To 2013/11/20 21:46:35\c'.
ERROR: I don't understand ':46:35 To 2013/11/20 21:46:35\c' in command: 'COMMENT:From 2013/11/19 21:46:35 To 2013/11/20 21:46:35\c'.
To solve the issue, login to cacti with admin account.
Go to Settings >> General >> Choose RRDTool Utility Version that installed on your Cacti host
(in my case, i installed 1.4.2 and chosen 1.3.x . no issue, works fine.)
Go to Settings >> General >> SNMP Utility Version >> Choose Version 1.
