http://docs.info.apple.com/article.html?artnum=55743 says that's a memory error, and to also look for an extensions conflict. Allocate LW as much memory as you can (I've set mine for 100 megs when in OS 9). I'm waiting for an answer from pro support about how much memory is optimal, and for advice on how much to give the Apple Applet Runner (in the MRJ 2.2.5 folder). I've given MRJ 64 megs too, but I don't know if that helps.