The problem is still there! err:msvcrt:MSVCRTD_operator_new_dbg Not allowed nBlockUse value: 2 I used Ubuntu8.10Wine 1.1.15Oracle9 When I run the program which works properly under Windows the error poped out: err:msvcrt:MSVCRTD_operator_new_dbg Not allowed nBlockUse value: 2 I replaced msvcrt.dll with winetricks vcrun6 as what vitamin said, then set it to native in winecfg as austin said, but the error is still there err:msvcrt:MSVCRTD_operator_new_dbg Not allowed nBlockUse value: 2 I deleted or modified...\windows\sysytem32\msvcrt.dllthe same error poped up. It looks like winecfg doesn't work. Does anyone have any ideas what I should do?