I am using a 32 bit JDK because as you have guessed FB is not 64 bit capable at this time.
BTW, I have discovered that command line vmargs do not override settings specified in the ini file, contrary to the docs. In other words, given the ini file I posted earlier, the following does not affect Xmx: "E:\Program Files\Adobe\Adobe Flash Builder 4\FlashBuilder.exe" -vm "E:\Program Files\Java\jdk1.6.0_20\bin" -Xmx1500m It would be more helpful to post complete and working ini files that provide >800M of heap. "In theory there is no difference between theory and practice. In practice there is." -- Attributed to Jan L. A. van de Snepscheut, Yogi Berra and Albert Einstein. > > FlashBuilder.ini file is: > > > > -nl > > en_US > > -startup > > plugins/org.eclipse.equinox.launcher_1.0.201.R35x_v20090715.jar > > --launcher.library > > plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.0.200.v20090519 > > -vmargs > > -Xms800m > > -Xmx800m > > -XX:MaxPermSize=384m > > -XX:PermSize=128m > > -Djava.net.preferIPv4Stack=true > > Mike
