To halt MAP, enter CONTROL-C (on a workstation) or CONTROL-BREAK (on a PC). On a workstation, make sure that when you enter CONTROL-C the active window is the window from which you invoked the mapper. The operation in progress is halted. Some files may be left when the mapper is halted (for example, a MAP report file or a physical constraints file), but these files may be discarded since they represent an incomplete operation.