memory condition too low

I have several Ecco files including large files. When I launch the program, numerous alarms have to be dealt with, i.e., leave them alone or snooze them for a future time. 
 

 Sometimes when I finish with that procedure and I click to Close, it reports that it couldn't do anything with them due to low memory condition. This concerns me greatly. 
 

 I have tried to avoid the problem by closing any large applications that are running. Sometimes it works and sometimes it doesn't. 
 

 I am concerned that I am losing those alarms. 
 

 I am running the basic Ecco application because the last time I installed the Eccoext update, I got a weird result.
 

 Any thoughts?
 

 Thanks,
 Bill