Hi, finally the link bug has gone and now a old problem has come back here. The nondebug version crashes with the following not very helpful stackcrawl but the debug version runs just fine. Any ideas what happened or what to do? loading symbols segment violation occurred 800f42c3: * 0689 movl %eax, (%esi) pe:sc frame retaddr fcffbd84 80054be5 #File pe text + 00054be5 fcffbee4 80093f2e #File pe text + 00093f2e fcffbf24 800975f7 #File pe text + 000975f7 fcffc4d4 8009be0f #File pe text + 0009be0f fcffc514 80046d05 #File pe text + 00046d05