hello friends, 
first of all, im a little new to working with OWLapi ontologies and reasoners, second Thanks for your time! 

I have been looking arroung for some time now about this Java Heap Space error. It appears to be very common but i havent been able to work arround it. 

Im using the OWLapi 3.4.1 with Pellet 2.3.0  on my netbeans 64bit machine (my personal laptop that is) and I got a kind of large ontology 30k logical axioms in 9k individuals. 

I have been reading and searching and I came across this: 
http://andrewmcknight.blogspot.com/2008/06/pellet-owlapi-swrl.html

from that list, i did try to increase the memory -Xms3072m  but didnt work. =( 

the second option sounds promising but I really dont know how to separate my ontology into different graphs.

Q: How can I do "the break your data into separated named graphs " thing?? 

Q2: is there a better way to work arround the java heap Space error??