JMeter can not save my test plan

[Bruno CHARLOUP]

Hi all,
I'm working with JMeter 2.0.1.
I have the following error message when I try to save my test plan :
org.apache.jmeter.exceptions.IllegalUserActionException: Couldn't save test
plan to file ...
 
The file to be saved is about 6 Mo : do you know if it exist a max size for
JMeter file ? or may I change parameter to allow more memory to Java ?
 
Thanks in advance for any help.
 
Bruno.