It is first to post the message to this newsgroups. I ported the blackdown jvm to my boards. The system spec for my board is CPU:StrongArm sa1110 Flash memory: 32 M RAM:32M When I use the native thread, My java application works well. shell) java -native -jar Myjar.jar But When I use the green thread, segmentation faults. shell) java -green -jar Myjar.jar segmentation fault. I heard that this problem may happen because of stack size. So according to the advice, limit the stack size to 2048(2M) That is , in linux shell)ulimit -s 2048 but I didn't solve my problme. I hope your advice. ========================================================= SunGun, Cho Team Of Media Tech My Duties : Edispenser TEL:82-2-3461-4976 #232 H.P:82-017-763-1201 - AIM SYSTEMS, INC - ========================================================= ¡CRP‚D€Dzf¢–Ú#jö¥Š{±ê®zËcjö›•§$vŒ'¢¸0ŠØZ²æãyËh~éì¹»®&ÞNº.nW‚¢{ZrÙ®VåiÉ£ è®