Hi! I compiled a 64/32 bit VM from svn. Immediately after start I get a SIGSEV at: interp.c line 7865: longAtput(where + ((ReceiverIndex + i) << ShiftForWord), longAtPointer(localSP - ((argCount2 - i) * BytesPerWord))); I examined the arguments to longAtput and they seem OK. But there is no Memory mapped at sqMemoryBase. How could that happen? Martin