Cacti Alert Mail Doesn't show graph image for a graph

[nisha15]

Hi
I have many devices in cacti which further have graphs and thresholds defined. Evrything works fine except for one graph where in the email I get the following(instead of graph)

Message type:Alert
Message: ALERT: NIsha_LTI_AppShop App Server - Tomcat Status [jvm_memory_free] [jvm_memory_free] went below threshold of 70 with 69.8736
URL: http://10.101.3.14/cacti//graph.php?loc ... 0&rra_id=1



Could not open!
http://10.101.3.14/cacti//graph_image.p ... _type=tree

Note: This is an automated email notification from Cloud Cacti Monitoring System. Please do not reply to this email.

There should not be any problems in cacti as it is showing all other graphs!